Boeing 747-400: Difference between revisions

Boeing 747-400
Boeing 747-400
	A 747-400ER of Qantas, seen at Melbourne Airport in 2011.
General information
Type	Wide-body airliner
National origin	United States
Manufacturer	Boeing
Status	In limited passenger service, in cargo service
Primary users	Atlas Air Lufthansa; UPS Airlines; Cargolux;
Number built	694
History
Manufactured	Passenger versions: 1988–2005; Freighter versions: 1993–2009; Combi versions: 1989–2002;
Introduction date	February 9, 1989, with Northwest Airlines
First flight	April 29, 1988
Developed from	Boeing 747-300
Variants	Boeing YAL-1; Boeing 747 Large Cargo Freighter; 747 Supertanker;
Developed into	Boeing 747-8

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Revision as of 04:21, 13 September 2024

The Boeing 747-400 is a large, long-range wide-body airliner produced by Boeing Commercial Airplanes, an advanced variant of the initial Boeing 747. The "Advanced Series 300" was announced at the September 1984 Farnborough Airshow, targeting a 10% cost reduction with more efficient engines and 1,000 nautical miles [nmi] (1,900 km; 1,200 mi) of additional range. Northwest Airlines became the first customer with an order for 10 aircraft on October 22, 1985. The first 747-400 was rolled out on January 26, 1988, and made its maiden flight on April 29, 1988. Type certification was received on January 9, 1989, and it entered service with Northwest on February 9, 1989.

It retains the 747 airframe, including the 747-300 stretched upper deck, with 6-foot (1.8 m) winglets. The 747-400 offers a choice of improved turbofans: the Pratt & Whitney PW4000, General Electric CF6-80C2 or Rolls-Royce RB211-524G/H. Its two-crew glass cockpit dispenses with the need for a flight engineer. It typically accommodates 416 passengers in a three-class layout over a 7,285 nmi (13,492 km; 8,383 mi) range with its 875,000-pound (397 t) maximum takeoff weight (MTOW).

The first -400M combi was rolled out in June 1989. The -400D Domestic for the Japanese market, without winglets, entered service on October 22, 1991. The -400F cargo variant, without the stretched upper deck, was first delivered in May 1993. With an increased MTOW of 910,000 lb (410 t), the extended range version entered service in October 2002 as the -400ERF freighter and the -400ER passenger version the following month. Several 747-400 aircraft have undergone freighter conversion or other modifications to serve as transports of heads of state, YAL-1 laser testbed, engine testbed or the Spirit of Mojave air launcher. The Dreamlifter is an outsize cargo conversion designed to move Dreamliner components.

With 694 delivered over the course of 20 years from 1989 to 2009,^[3] it was the best-selling 747 variant. Its closest competitors were the smaller McDonnell Douglas MD-11 trijet and Airbus A340 quadjet. It has been superseded by the stretched and improved Boeing 747-8, introduced in October 2011. Beginning the late 2010s, 747-400 passenger aircraft began being phased out by airlines in favor of long-range, wide-body twinjet aircraft, such as the Boeing 777 and Airbus A350.

Development

Background

Following its introduction in 1969, the Boeing 747 became a major success with airlines and the flying public.^[4] As the world's first wide-body jetliner, the 747 had revolutionized air travel, and cemented its manufacturer's dominance in the passenger aircraft market.^[5] In 1980, Boeing announced the 747-300, its latest 747 variant featuring greater passenger capacity. This was made possible by making a stretched upper deck (SUD), previously an option on the 747-200, a standard feature.^[6] The SUD was almost twice as long as the original 747 upper deck. Besides increased capacity, the 747-300 did not offer any increase in range, nor did it include improvements in flight deck technology or construction materials.^[7] At the same time, 747s were becoming more costly to operate due to a number of factors, notably conventional flight control systems, three-person flight crews, and fuel costs.^[4]

In 1982, Boeing introduced a two-crew glass cockpit, new engines, and advanced materials on its 757 and 767 twinjets.^[7] At the same time, combined sales of the 747-100, −200, −300, and 747SP models (collectively referred to as the 747 "Classics") exceeded 700, but new orders slowed precipitously.^[8] The introduction of the 747-300 did little to stem the decline, and itself faced potential competition from more modern designs. As a result, Boeing began considering a more significant upgrade for its largest passenger jet.^[7]

By early 1984, company officials had identified five development objectives for the latest 747 upgrade: new technologies, an enhanced interior, a 1,000 nautical miles (1,900 km; 1,200 mi) range increase, more efficient engines, and a 10 percent reduction in operating cost.^[7] In September 1984, Boeing announced development of the newest 747 derivative, the "Advanced Series 300", at the Farnborough Airshow.^[7] On October 22, 1985, the type was officially launched when Northwest Airlines became the first 747-400 customer, with an order for 10 aircraft.^[9] Cathay Pacific, KLM, Lufthansa, Singapore Airlines, and British Airways also announced orders several months later, followed by United Airlines, Air France, Malaysia Airlines and Japan Airlines.^[9]

Design effort

Seven early customers, namely British Airways, Cathay Pacific, KLM, Lufthansa, Northwest, Qantas and Singapore Airlines, formed a consultative group to advise Boeing on the 747-400's design process.^[10] While the aircraft was planned as a new-technology upgrade, Boeing originally proposed minimal design changes in order to reduce development cost and retain commonality with existing models.^[10] The airline consultative group sought more advanced changes, including a two-crew glass cockpit. As a result of airline input, the 747-400's new digital cockpit design featured cathode-ray tube (CRT) display technologies first employed on the 757 and 767. The autopilot was also changed to that of the 757 and 767; on the 747-400 a software update was added to allow an 'altitude intervention' mode.^[11]^: 145

The 747-400's wingspan was stretched by 17 feet (5.2 m) over the Classic 747 through wingtip extensions. For reduced aerodynamic drag, the wings were fitted with 6 feet (1.8 metres)-tall winglets.^[12] Despite the added length, the wings were 6,000 pounds (2,700 kg) lighter as a result of new aluminum alloys.^[12] The horizontal tail was also redesigned to fit a 3,300 US gallons (12,000 L) fuel tank, resulting in a 350 nautical miles (650 km; 400 mi) range increase, and the rudder travel was increased to 30 degrees.^[12] The landing gear was redesigned with larger wheels and carbon brakes.^[12] Internal changes further included a restyled cabin with new materials and updated fittings.^[13]

New engines offered on the 747-400 included the Pratt & Whitney PW4056, the General Electric CF6-80C2B1F, and the Rolls-Royce RB211-524G/H.^[12] The engines offered lower fuel consumption and greater thrust, along with a full-authority digital engine control (FADEC) which adjusted engine performance for improved efficiency compared with the Classic 747s.^[12] A new auxiliary power unit (APU) manufactured by Pratt & Whitney Canada was also selected to provide on-ground power for the 747-400, with a 40 percent reduction in fuel consumption compared to previous APU designs.^[12]

Production and testing

Final assembly of the first 747-400 began at Boeing's Everett factory, the longtime site of 747 production, in September 1987.^[13] More than fifty percent of the aircraft was produced by subcontractors, with major structures, engine nacelles, and sub-assemblies supplied by Northrop, and upper deck fuselage frames from Daewoo.^[14] All components were integrated during the final assembly process at the Everett factory. The first aircraft, equipped with PW4056 engines, was completed over the winter months of late 1987.^[13] On January 26, 1988, the first 747-400 rolled out at the Everett factory, while the first 737-400 rolled out at Boeing's Renton factory on the same day, marking the first double jetliner rollout in the manufacturer's history.^[13] By the time of the rollout, the 747-400 program had amassed more than 100 orders.^[13]

The 747-400 flew for the first time on April 29, 1988, under the command of test pilot James Loesch and co-pilot Kenneth Higgins.^[15] The first flight was six weeks behind schedule, owing to subcontractor delays in supplying components, and extra troubleshooting on the aircraft's electronics systems.^[13] The maiden flight took off from Paine Field, site of the Everett factory, and landed at Boeing Field, south of Seattle, after an uneventful 2 hours and 26 minutes.^[15] The 747-400's flight test program utilized the first four aircraft built, one more than the minimum number necessary to certify the aircraft's three engine options.^[15] One test aircraft each was fitted with the CF6-80C2B1F and RB211-524G/H engines, while the other two featured PW4056 engines, with the fourth aircraft serving as a backup.^[15] Federal Aviation Administration (FAA) certification was received on January 9, 1989, with Pratt & Whitney PW4000 engines, May 18, 1989, with General Electric CF6-80C2s and June 8, 1989, with Rolls-Royce RB211-524Gs.

As the flight test program proceeded, Boeing encountered problems in the 747-400's production process, leading it to disclose delivery delays of up to one month for the first 20 aircraft built.^[13] A primary reason for the delays was the unprecedented complexity of interior configurations offered to airlines, which ranged from lavatory and galley locations to the color shades of cabin warning labels.^[13] Coupled with new, relatively inexperienced workers, a lack of veteran technicians, interior configurations needing costly re-work, and teething problems with electronics integration on the advanced flight deck, 747-400 production fell behind schedule.^[13] The company managed to resolve early production issues by mid-1989, with the first example airframes of all three engine variants delivered within four months of each other, and overall delays not exceeding several weeks.^[13]

Service entry and operations

The first 747-400 (N661US) was delivered to launch customer Northwest Airlines.^[16] This jet became known for an incident on Northwest Flight 85 caused by a rudder hardover.^[17] N661US was later sold to Delta Airlines when Northwest merged with it. N661US later became preserved at the Delta Flight Museum. This was the twentieth anniversary of the 747-100's first flight. On May 31, 1989, Singapore Airlines operated the first international service using a 747-400, on a flight from Singapore to London.^[18]

In May 1989, one week before the initial delivery to the 747-400's first European customer, KLM, the Joint Aviation Authorities (JAA) shocked Boeing by refusing to grant regulatory certification for the aircraft, citing the upper deck cabin floor's resistance to collapse in the event of a sudden decompression.^[13] While the manufacturer asserted that the 747-400's cabin floor was no different from the already-certified and in-service 747-300, the JAA maintained that the newer model would have a service life into 2020 and beyond and was thus subject to a newer, more stringent standard which had been updated to reflect the risk of explosive devices.^[19] In the days leading up to the first delivery to KLM, negotiations between Boeing, the FAA, and the JAA resulted in a compromise: a temporary operating certificate would be issued for the 747-400, provided that the manufacturer develop a structural retrofit for the aircraft within two years.^[19] The last-minute deal allowed KLM and Lufthansa to take delivery of their 747-400s without further delays.^[19]

After the first 747-400 deliveries, Boeing began production on more variants of the aircraft. The first 747-400 Combi, able to carry both passengers and freight, was rolled out in June 1989.^[19] The 747-400 Domestic, a short-range variant of the aircraft designed for Japanese intra-island services, first flew on March 18, 1991, and entered service with Japan Airlines on October 22, 1991. A cargo variant, the 747-400F, was first delivered in May 1993 to Cargolux.^[19] By the end of the 1990s, Boeing was producing four versions of the 747-400.

Further developments

The extended range freighter (ERF) entered service in October 2002. The next month, the extended range (ER) passenger version entered service with Qantas, the only airline ever to order the passenger version of the 747-400ER. Qantas initially used the 747-400ER for the Melbourne to Los Angeles and Dallas to Sydney route allowing the completion of the flight with full passenger load and cargo. Prior to the 747-400ER, Qantas would complete such flights by blocking out 'E' zone of the cabin and limiting passenger numbers and cargo. The 747-400ER featured the Boeing Signature Interior, which was later made available on the 747-400 (either as a retrofit on existing 747-400s or factory installation on new frames).

The 747-400ER also introduced some flight deck enhancements, including liquid-crystal displays (LCDs), which replaced the six cathode ray tube (CRT) displays found on the Boeing 747-400. LCDs later became standard on the 747-400 as well, and could be retrofitted to earlier aircraft. The three standby flight displays found on the 747-400 were also replaced by a single combined LCD, the integrated standby flight display (ISFD), which also became standard on the 747-400 in late 2003.^[20]

In the 2000s, as part of an effort to promote sustainable and alternative fuel development, as well as lower emissions, several 747-400 operators studied the use of oil extracted from the jatropha plant. Air New Zealand carried out the first commercial flight using jatropha oil for fuel; the airline's 747-400 had one engine burning a mix of 50% jatropha oil and 50% jet fuel for two hours during the flight while engineers collected data. Continental Airlines tested jatropha oil in one of its airliners on January 7, 2009. Jatropha is easy to grow, needs little fertilizer or water, and produces an oil-rich plant.^[21]

Production of the 747-400 passenger version officially ceased on March 15, 2007.^[2] The last four -400s on order were cancelled by Philippine Airlines (which switched to the 777-300ER). The last to order the -400 was China Airlines in November 2002, with the last passenger 747-400 constructed in 2005 and delivered in April of that year.^[2] It was the 1358th 747 (MSN33737/B-18215).^[22] The last 747-400 was a -400ERF delivered on December 22, 2009, to Kalitta Air.^[3]

Retirement and economic value

The 747-400's leasing, resale and salvage value has dropped steeply because it is relatively expensive to operate. As most 747-400s are now more than 20 years old, airlines are beginning to replace them. Airlines using the 747-400 have been retiring the model, replacing it with more fuel efficient aircraft. The main appeal of the 747-400 like its predecessors was its range rather than its capacity, and in most cases it has been replaced by wide-body twin-engine aircraft of similar range, such as the Boeing 777 and Boeing 787 Dreamliner. The change in emphasis from hub and spoke operations to point-to-point flights has also reduced the need for jumbo jets.^[23] Airlines such as British Airways and Qantas that plan to maintain the same capacity on routes currently served by 747-400s ordered the Airbus A380 rather than the updated 747-8.^{[citation needed]}

For example, Delta Air Lines reduced the number of flights it operated from the United States to Narita International Airport that were intended to transfer passengers to other destinations in Asia, switching to twin-engine widebody aircraft operating from an expanded hub at Seattle-Tacoma International Airport.^[24] Total capacity was cut, but load factors improved. In April 2015, Delta announced it would accelerate the retirement of its 747-400s and replace them either with Airbus A330 or Airbus A350 aircraft (both of which are twinjets). Delta could not keep the 747s full without deeply discounting ticket prices; the discounts and increased maintenance required of a four-engine aircraft led to a drag on profits.^{[citation needed]}

Since the cost of replacing a 747-400 is high (an airline must purchase or lease another wide-body), some operators choose to fly the 747-400 to the conclusion of its accepted useful life and then scrap it. The current parts resale value for this aircraft has been reduced to its engines. When a 26-year-old 747-400 owned by Delta flew through a violent hailstorm, the company indicated it was likely the aircraft would be scrapped. George Dimitroff, head of valuations for FlightGlobal, estimated the aircraft's value before the incident at about $8 million. He noted that this was not the same as its insured value.^[25]^[26] As discussed in the section on 747-400 converted freighters, there is no longer a viable economic model for converting retired passenger 747-400 aircraft into dedicated freighters, so most retired passenger aircraft will likely be scrapped.^{[citation needed]}

Several airlines have retired their 747-400s from the trans-pacific market. Remaining operators in 2014 included EVA Air, Qantas, Virgin Atlantic, British Airways and United Airlines.^{[citation needed]} United's deployment of them also reflected a change in emphasis from Asian hubs to domestic hubs.^[27] On January 11, 2017, United announced it would begin phasing out its 747-400s and made its last 747 flight on November 7 that year.^[28]^[29] Delta Airlines was the last US airline to operate the Boeing 747, retiring the last of the 747-400 fleet it inherited from Northwest Airlines in December 2017.^[30]

Impact of the COVID-19 pandemic

Prior to COVID-19, British Airways, the largest passenger 747-400 operator then, announced that they would've phased out their 747-400 fleet in February 2024, replacing it with the Airbus A350-1000. Lufthansa was to retire their 747-400 fleet in 2025 as they were to be replaced by the Boeing 777x and the Boeing 747-8i. KLM planned to retire their 747-400 Combi and Passenger fleet in 2020 as they were being replaced by the Boeing 777-300ER, the Boeing 787-10, and the Airbus A350-900. However, KLM announced it plans to retire its last Boeing 747-400 by January 1, 2021, instead of 2020 due to delivery delays for the new wide-body twin jets.^{[citation needed]}

The global COVID-19 pandemic hastened the retirement of many remaining passenger Boeing 747-400s due to a sharp decline in passenger traffic.^[31] For instance, KLM retired its Boeing 747-400 Combi and Passenger fleets in March 2020. Qantas announced the retirement of its 747-400 and 747-400ER fleet by the end of 2020, with the Boeing 787-9 Dreamliner taking its place. China Airlines also announced that they will be retiring their remaining four passenger Boeing 747-400s by the end of 2020 due to the COVID-19 pandemic (which were delivered between 2004 and 2005, operating on flights within Asia) with the Airbus A350-900 and Boeing 777-300ER taking over all high-volume routes and all Asian International routes. However, China Airlines didn't retire its last passenger Boeing 747-400 until February 2021. British Airways retired its remaining 31 Boeing 747-400s 4 years ahead of the original February 2024 deadline.^[32] Virgin Atlantic also retired their remaining leisure fleet 747-400s in May 2020 citing the COVID-19 pandemic - the fleet was due to retire in 2021.^[33] As of September, 2021, there were just 42 passenger 747-400 in operation (10 actively flying, 32 in storage) across 10 carriers worldwide. Lufthansa and Air China had plans to resume flying some of their stored aircraft by October, 2021.^{[citation needed]}

On 29 April 2022, Air India retired its remaining 747-400 planes in its fleet, after the Directorate General of Civil Aviation deregistered them.^{[citation needed]} In March 2024, Asiana Airlines announced to retire their sole remaining 747-400, leaving Air China as the last scheduled passenger operator in Asia.^[34]

Design

The 747-400's airframe features extended and lighter wings than the previous 747s, capped by winglets. The winglets result in a 3 percent increase in long-range cruise, improved takeoff performance, and higher cruise altitudes.^[12] The extended wingspan also gains an additional leading edge flap section.^[12] When unfurnished, the basic 747-400 fuselage is lighter than preceding models, but when fitted out it is heavier and stronger than previous models.^[35] The landing gear uses the same configuration as the previous 747s, but with carbon brakes replacing the previous steel ones, and overall weight savings of 1,800 pounds (820 kg).^[35]

The 747-400's glass cockpit features CRT displays which show flight instrumentation along with engine indication and crew alerting system (EICAS) diagnostics.^[10] The flight engineer station on the previous 747s is no longer installed, and the new displays and simplified layout results in a two-thirds reduction of switches, lights, and gauges versus the Classic 747.^[10] Other new systems include an advanced Honeywell flight management computer (FMC) which assists pilots in calculating optimal altitudes and routes along with a Rockwell-Collins central maintenance computer (CMC) which automates troubleshooting tasks.^[10]

The redesigned 747-400 interior features new cabin sidewalls, heat-resistant phenolic glass and carbon composite paneling, and larger storage bins.^[13] An enhanced in-flight entertainment framework, called the Advanced Cabin Entertainment/Service System (ACESS), debuted on the 747-400, which integrates 18-channel audio capability, four-passenger intercom announcement zones, inter-cabin telephones, and passenger lighting into a central system.^[36] An eight-bunk overhead crew rest is installed above the aft cabin, while a second crew rest area is located on the upper deck behind the cockpit for flight crew use.^[36]

The last few 747-400s delivered feature the Boeing Signature Interior, derived from the Boeing 777.^[37]

Qantas 747-400 main deck economy class cabin
Cathay Pacific 747-400 upper deck business class
Delta Air Lines 747-400 main deck BusinessElite cabin

Variants

747-400

The original variant of the redesigned 747, the 747-400 debuted an increased wingspan, winglets, revised engines, and a glass cockpit which removed the need for a flight engineer. The type also featured the stretched upper deck (SUD) introduced with the 747-300. The passenger model formed the bulk of 747-400s sold, and 442 were built.

In 1989, the Qantas 747-400 VH-OJA flew non-stop from London Heathrow to Sydney, a distance of 18,001 km (11,185 mi), in 20 hours and 9 minutes to set a commercial aircraft world distance record.^[38]^[39] As of 2014^[update], this is the fastest heavyweight flight between London and Sydney.^[40] This was a delivery flight with no commercial passengers or freight on board. During testing, the first 747-400 built also set a world record for the heaviest airliner takeoff on June 27, 1988, on a flight to simulate heavy-weight stalls.^[15] The aircraft had a takeoff weight of 892,450 pounds (404,810 kg), and in order to satisfy Fédération Aéronautique Internationale regulations, climbed to a height of 6,562 feet (2,000 m).^[15] On February 9, 2020, a British Airways Boeing 747-400 broke the New York–London subsonic airliner speed record in 4 hours 56 minutes, pushed by the powerful Jetstream linked to Storm Ciara.^[41]

747-400F

The 747-400F (Freighter) is an all freight version of the 747-400. While using the updated systems and wing design of the passenger versions, it features the original short upper deck found on the classic 747s to reduce weight. The 747-400F has a maximum takeoff weight of 875,000 pounds (397,000 kg) and a maximum payload of 274,100 pounds (124,000 kg). The -400F can be easily distinguished from the passenger -400 by its shorter upper-deck hump and lack of windows along the main deck.^{[citation needed]}

The model's first flight was on May 4, 1993, and entered service with Cargolux on November 17, 1993. Other major customers included Atlas Air, China Airlines, Korean Air, Nippon Cargo Airlines and Singapore Airlines.^{[citation needed]}

The 747-400F has a main deck nose door and a mechanized cargo handling system. The nose door swings up so that pallets or containers up to 40 ft (12 m) can be loaded straight in on motor-driven rollers. An optional main deck side cargo door (like the 747-400M Combi) allows loading of dimensionally taller cargo modules. A lower deck ("belly") side door allows loading of unit load devices (ULD) up to 163 cm in height. Boeing delivered 126 Boeing 747-400F aircraft with no unfilled orders as of November 2009^[update].^[1] The last -400F was delivered to Nippon Cargo Airlines on August 2, 2008.^{[citation needed]}

747-400M

The 747-400M (a passenger/freight or "Combi" variant originally designated as 747-400BC) first flew on June 30, 1989, and entered service with KLM on September 12, 1989. Based on the successful Combi versions of the Classic 747s, the 747-400M has a large cargo door fitted to the rear of the fuselage for freight loading to the aft main deck cargo hold. A locked partition separates the cargo area from the forward passenger cabin, and the -400M also features additional fire protection, a strengthened main deck floor, a roller-conveyor system, and passenger-to-cargo conversion equipment.^[42] The last 747-400M was delivered to KLM on April 10, 2002.^[43] Boeing sold 61 747-400M aircraft, which was similar to earlier 747 "Combi" versions (78 747-200M, 21 747-300M).

KLM was the last commercial 747-400M operator. KLM initially planned to retire their 747-400M by January 1, 2021, however the Boeing 747-400M was instead retired by March 27, 2020, as Air France-KLM announced in early March 2020 to retire all remaining passenger Boeing 747-400s of KLM (including all KLM Boeing 747-400M aircraft) immediately due to reduced air travel demand caused by the COVID-19 pandemic, although, due to a global shortage in air cargo capacity, three KLM 747-400Ms were temporarily reactivated after just a week to operate cargo-only flights to Asia.^{[citation needed]} As of 2024, Air Atlanta Icelandic, an Icelandic cargo and charter passenger airline, operates one Boeing 747-400M.^{[citation needed]}

747-400D

The 747-400D (Domestic) is a high-density seating model developed for short-haul, high-volume domestic Japanese flights, serving the same role as the prior Boeing 747SR domestic model. This model is capable of seating a maximum of 568 passengers in a two-class configuration or 660 passengers in a single-class configuration.^[44]

The -400D lacks the wingtip extensions and winglets included on other variants. Winglets would provide minimal benefits on short-haul routes while adding extra weight and cost. The -400D may be converted to the long-range version if needed. The 747-400D can be distinguished from the otherwise similar-looking 747-300 by the extra windows on the upper deck. These allow for extra seating at the rear of the upper deck, where a galley would normally be situated on longer flights. In total, 19 of the type were built, with the last example delivered to All Nippon Airways on February 11, 1996.^[43] This variant was retired when ANA retired its last 747-400D on March 31, 2014.^[45]

747-400ER

The 747-400ER (Extended Range) was launched on November 28, 2000, following an order by Qantas for six aircraft.^[43] The model was commonly referred to as the '910k', signifying its maximum weight achieved via structural modifications and modified landing gear. The 747-400ER included the option of one or two additional 3,240 US gal (12,300 L) body fuel tanks in the forward cargo hold, but Qantas only ordered the single body tank configuration, and no airplanes were delivered with two body fuel tanks. Manufactured by Marshall Aerospace, the tanks utilized metal to metal honeycomb-bonded technology to achieve a high fuel volume-to-dry weight ratio. The tanks featured a double wall and an integrated venting system, and achieved fuel control via a modified Fuel System Management Card (FSMC) which optimized fuel transfer into the Center Wing Tank (CWT) in flight, along with fuel transfer from the Horizontal Stabiliser Tank (HST). The tank was removable using tooling that interfaced with the cargo loading system. Similar technology had been used by Marshall in the development of body fuel tanks for the Boeing 777-200LR and Boeing P-8A Poseidon. Other changes to the 747-400ER included the relocation of oxygen system components and the potable water system tanks and pumps, because the body fuel tanks prevent access to the standard locations.^[46]^{[not specific enough to verify]}

The first 747-400ER was used as a test flight airplane and painted in Boeing colors, with registration N747ER. Qantas received the first delivery of a 747-400ER registration VH-OEF on October 31, 2002, although it was the second airplane built. The flight test airplane was later refurbished, repainted in standard QANTAS livery, and registered as VH-OEE. Qantas was the only customer for the passenger version of the 747-400ER, chosen by the airline to allow for full loads between Melbourne and Los Angeles, particularly in the western direction. The 747-400ER could fly 500 miles (800 km) farther, or carry 15,000 lb (6,800 kg) more payload, than the -400.^[46]^{[not specific enough to verify]}

In May 2018, Qantas announced that it would retire the whole of its 747 fleet by 2020, including all 747-400ERs.^[47]

747-400ERF

The 747-400ERF (Extended Range Freighter) is the freight version of the -400ER, launched on April 30, 2001.^[43] The 747-400ERF is similar to the 747-400F, except for increased gross weight capability which allows it to carry more payload. Unlike the 747-400ER, no customers ordered the optional body (cargo compartment) fuel tanks which reflects the desire to carry more cargo, not fuel, as the benefit of the improved payload rating. The 747-400ERF has a maximum takeoff weight of 910,000 pounds (412,769 kg) and a maximum payload of 248,600 pounds (112,760 kg). It offers cargo airlines the choice of either adding 22,000 pounds (10,000 kg) more payload than other 747-400 freighter variants, or adding 525 nautical miles (972 km; 604 mi) to the maximum range.^[48]

The -400ERF has a range of 5,700 miles (9,200 km) with maximum payload, about 326 miles (525 km) farther than the standard 747-400 freighter, and has a strengthened fuselage, landing gear, and parts of its wing, along with new, larger tires. The first -400ERF was delivered to Air France (via ILFC) on October 17, 2002. Boeing has delivered 40 Boeing 747-400ERFs with no outstanding orders.^[1] The new 747-8 Freighter has more payload capacity, but less range than the 747-400ERF when both are at maximum takeoff weight.^[49]

Freighter conversions

The 747-400BCF (Boeing Converted Freighter), formerly known as the 747-400SF (Special Freighter), is a conversion program for standard passenger 747-400 aircraft. The project was launched in 2004 with conversions by approved contractors such as HAECO, KAL Aerospace and SIA Engineering Company. The first Boeing 747-400BCF was redelivered to Cathay Pacific Cargo and entered service on December 20, 2005.^[50] Cathay retired the 747-400BCF in 2017 after 11 years of service.

The 747-400BDSF (BeDek Special Freighter) is another passenger-to-freighter conversion, carried out by Israel Aerospace Industries (IAI). The first 747-400BDSF was redelivered to Air China Cargo in August 2006.^[51] Several Boeing 747-400M "combi" aircraft operated by EVA Air were also converted to pure cargo aircraft by IAI.^[52]

Neither the 747-400BCF or the 747-400BDSF has a nose cargo door; freight can only be loaded through the side cargo door.

The demand for converted 747-400 freighters declined in the early 2010s, due to the availability of belly cargo capacity on more efficient passenger wide-body twinjets, and new orders for Boeing 747-8F and 777F freighters. Approximately 79 747-400 aircraft were converted before the programs were terminated; 50 of these aircraft were converted by the BCF program, with the remaining 29 under the BDSF offering. Boeing announced the end of the BCF program for the 747-400 in 2016, although conversions had ceased years earlier with no orders after 2012.^[53]

747 Large Cargo Freighter

Boeing announced in October 2003 that, because of the amount of time involved with marine shipping, air transport would be the primary method of transporting parts for the Boeing 787 Dreamliner. Used passenger 747-400 aircraft have been converted into an outsize, "Large Cargo Freighter" (LCF) configuration to ferry sub-assemblies to Everett, Washington for final assembly.^[54] The LCF has a bulging fuselage similar to that of the Aero Spacelines Super Guppy or Airbus Beluga cargo aircraft.

The conversion, designed by Boeing engineers from Puget Sound, Moscow and Canoga Park, Cal., and Gamesa Aeronáutica in Spain,^[55] was carried out in Taiwan by a subsidiary of the Evergreen Group.^[56] Boeing purchased four second-hand aircraft and had them all converted;^[57] the fourth and final LCF took its first flight in January 2010.

Delivery times are as low as one day using the 747 LCF, compared to up to 30 days for deliveries by ship.^[57] The LCF can hold three times the volume of a 747-400F freighter and had the largest cargo hold of any aircraft, until it was surpassed by the Airbus BelugaXL.^[55]^[58] The LCF is not a Boeing production model and has not been offered for sale to any customers. The LCFs are intended for Boeing's exclusive use.

Government, military and other variants

C-33: Proposed U.S. military transport version of the 747-400F, intended as an alternative to further purchases of the McDonnell Douglas C-17 Globemaster III during the 1990s Non-Developmental Airlift Aircraft (NDAA) program. The C-33 cost less and had greater range, although it could not use austere runways or handle outsize military equipment and had a higher expected operating cost. The plan was canceled in favor of the purchase of more C-17s.^[59] In the early 2000s, An Air Power Australia analysis deck (an independent think tank not affiliated with the RAAF or Australia's Department of Defence) looked at modifying the 747-400 platform for use as KC-33 tankers but ultimately abandoned it in favor of the 767-based tanker.^[60]
YAL-1: "Airborne Laser" carrier based on a 747-400F for the United States Air Force. The aircraft was heavily modified to carry a nose-mounted turret and Chemical Oxygen Iodine Laser (COIL) equipment in order to destroy Intercontinental Ballistic Missiles. The aircraft was retired in 2012 after cancellation of the program funding.^[61]
Cosmic Girl: A former Virgin Atlantic 747-400 named Cosmic Girl is used by Virgin Galactic as the air launch to orbit launcher for LauncherOne, an orbital rocket.^[62]^[63]
Evergreen 747 Supertanker: Global SuperTankers has converted an ex-Japan Airlines 747-400BCF for use as an airborne firefighter, serving as the second generation 747 Supertanker. The converted water bomber carries 19,600 US gallons (74,190 L) of water or chemical fire retardant in eight pressurized tanks. The United States Forest Service was considering the use of this aircraft in 2017.^[64] Global SuperTanker received FAA certification September 12, 2016.^[65]

Operators

Current operators

As of March 2024^[update], there were 19 passenger and 213 cargo versions of the 747-400 in operation worldwide.^{[citation needed]} The passenger operators are Lufthansa (8), Rossiya Airlines (5), Air China (3), Saudia (2) and Mahan Air (1).^{[citation needed]} As of August 2018, the largest cargo variant operators were Atlas Air (35), Kalitta Air (24) and Cargolux (16).^[66]^{[failed verification]}^{[needs update]}

Deliveries

Type	Total	2009	2008	2007	2006	2005	2004	2003	2002	2001	2000	1999	1998	1997	1996	1995	1994	1993	1992	1991	1990	1989
747-400	442					2	3	6	5	19	9	34	43	30	18	16	32	42	47	48	54	34
747-400D	19															2	1	6	8	2
747-400ER	6							3	3
747-400ERF	40	6	6	8	6	2	5	4	3
747-400F	126	2	8	8	8	9	7	6	15	12	15	10	8	4	3	5	4	2
747-400M	61								1		1	3	2	5	5	2	3	6	6	12	8	7
Total	694	8	14	16	14	13	15	19	27	31	25	47	53	39	26	25	40	56	61	62	62	41

Incidents and accidents

The first hull loss of a 747-400 occurred on November 4, 1993, when China Airlines Flight 605, flying from Taipei to Hong Kong's Kai Tak Airport, touched down more than 2,100 feet (640 m) past the runway's displaced threshold during 20-knot (gusting to 38 knots) crosswinds. Combined with the disengagement of auto brakes and retracted speed brakes, manual braking and thrust reversal were not enough to prevent the aircraft from sliding into Victoria Harbour. No one was seriously injured, but the aircraft was written off.^[67] The type's second hull loss occurred on October 31, 2000, when Singapore Airlines Flight 006, a 747-400 flying from Singapore to Los Angeles via Taipei, rammed into construction equipment while attempting to take off from a closed runway at Chiang Kai-shek International Airport during Typhoon Xangsane. The aircraft caught fire and was destroyed, killing 79 passengers and four crew members.^[68] The cause was attributed to the flight crew navigating to the wrong runway.^[68]

The 747-400F has recorded five hull-loss accidents. On September 3, 2010, UPS Airlines Flight 6 from Dubai International Airport to Cologne Bonn Airport crashed approximately 25 minutes after takeoff. The crew of the Boeing 747-400F declared an emergency due to an in-flight fire and attempted to return to Dubai. However, the fire had damaged the flight controls and the oxygen supply, causing the first officer to lose control of the aircraft and the captain to lose consciousness. The aircraft crashed into the ground at high speed during the second landing attempt, killing both crew members. Subsequent investigations determined that the fire had originated from lithium-ion batteries in the cargo hold.^[69]^[70] On July 28, 2011, Asiana Airlines Flight 991, a Boeing 747-400F flying from Incheon Airport to Shanghai Pudong Airport, crashed into the Pacific Ocean off Jeju Island, South Korea, after reportedly suffering mechanical problems due to a possible on-board fire. Two crew members on board were killed.^[71] National Airlines Flight 102, a 747-400BCF crashed on April 29, 2013 (the 25th anniversary of the type's first flight) at Bagram Air Base Afghanistan killing 7 crew members. The crash was attributed to a cargo shift of military vehicles to the back of the hold during take-off.^[72] On January 16, 2017, Turkish Airlines Flight 6491, a 747-400F operated by ACT Airlines, failed to reach the runway on landing in thick fog at Manas International Airport in Bishkek, Kyrgyzstan, crashed into a residential area, and caught fire. 39 people died, including all four crew members, and 35 people on the ground.^[73] On November 7, 2018, Sky Lease Cargo Flight 4854, a 747-400F overrun the runway on landing at Halifax Stanfield International Airport in Nova Scotia, Canada, and broken into two pieces, causing 3 of 4 people onboard injured with no fatalities.^[74]

Other incidents involving the 747-400 did not result in irreparable aircraft damage. On December 15, 1989, KLM Flight 867, a 747-400M, en route to Tokyo's Narita International Airport from Amsterdam's Schiphol International Airport via Anchorage International Airport, flew through a thick cloud of volcanic ash, causing severe damage to the aircraft and replacement of all four engines.^[75] On July 23, 1999, a man killed the pilot of All Nippon Airways Flight 61, a 747-400D bound for New Chitose Airport near Sapporo, Hokkaidō from Tokyo International Airport (Haneda), during an attempted hijacking, and was restrained by other crew members; the aircraft landed safely.^[76] On September 23, 1999, Qantas Flight 1, flying from Sydney to London via Bangkok, overran the runway after touching down more than 1,000 metres (3,300 ft) from the threshold during a storm with heavy rain, resulting in aircraft damage and minor passenger injuries.^[77] On January 31, 2001, the pilot of Japan Airlines Flight 907, a 747-400D bound for Naha International Airport from Tokyo Haneda Airport, made an emergency dive to avoid a collision with a Japan Airlines DC-10-40 due to conflicting instructions from air traffic control; several people on the 747-400 suffered injuries during the evasive manoeuvres and some interior damage was sustained to the aircraft.^[78]

On October 9, 2002, Northwest Airlines Flight 85, a Boeing 747-400 aircraft registered as N661US traveling from Detroit Metropolitan Wayne County Airport to Narita International Airport, made an emergency landing at Anchorage International Airport after a sudden lower rudder hardover.^[17] On July 25, 2008, Qantas Flight 30, traveling to Melbourne Airport from Hong Kong International Airport, made an emergency landing at Ninoy Aquino International Airport with a gaping hole in its lower forward fuselage; no one was hurt, and authorities determined that an exploding emergency oxygen supply bottle was the most likely cause.^[79]^[80]^[81]

Some incidents however, led to irreparable damage and those airframes were written off. On September 4, 2009, Air India Flight 829, a 747-437 (registered VT-ESM), suffered an engine fire at Mumbai, shortly before take-off. None of the 213 passengers and 16 crew was injured or killed, but the severe fire damage caused the aircraft to be written off and it was scrapped in May 2011.^[82] On 17 June 2015, Delta Air Lines Flight 159, a Boeing 747-451 (registered N664US), flying from Detroit to Seoul-Incheon, suffered substantial damage to the interiors, the nose cone, engines and wing slats, after flying through a severe hailstorm above China. The 26 year old 747 was ferried from Seoul to Marana, Arizona for storage. In 2021, a Boeing 747 freighter's engine caught fire and multiple parts detached, causing 2 people to be injured on the ground. The aircraft landed safely and was returned to service.^[83]

Aircraft on display

Following the gradual withdrawal of older examples of the type from passenger service from the early-2010s onward, a relatively large number of Boeing 747-400s have entered preservation after being decommissioned.

An ex-Qantas 747-400 formerly registered VH-OJA and named City of Canberra, the first 747-400 delivered to the airline, is displayed at the Historical Aviation Restoration Society museum at Illawarra Regional Airport south of Wollongong, New South Wales, Australia. It is the first 747-400 to be preserved, and also holds the record for the longest non-stop flight undertaken by a commercial aircraft, from London To Sydney in 20 hours, 9 minutes and 5 seconds, a record it has held since 1989.^[84]
N661US, a former Delta Air Lines example, is on display at the Delta Flight Museum at Hartsfield-Jackson Atlanta International Airport in Atlanta, Georgia.^[16]^[85] The aircraft was the first -400 series built, serving as the prototype (then registered N401PW) prior to delivery to Northwest Airlines in December 1989. It is also the aircraft that was involved in Northwest Airlines Flight 85.^[16]^[17]
In February 2019, a former KLM 747-400 registered PH-BFB and named City of Bangkok was transported on a giant trailer from Schiphol airport across fields, main roads and meadows to the Corendon Village Hotel in Badhoevedorp, having been repainted into Corendon's livery beforehand. To make this transport possible, the Motorway A9 was closed during the night from Friday February 8 until Saturday February 9.^[86] The aircraft was hauled a total of 12.5 kilometres over fields and roads to reach its new home at the hotel.^[87] Upon arrival at the hotel, the aircraft was installed in the grounds of the hotel complex.^[88]
PK-LHF, last operated by Lion Air was converted for use as the Steak 21 restaurant in Summarecon Bekasi, Indonesia. The plane was originally operated by Singapore Airlines registered 9V-SMC.^[89]^[90]
British Airways has preserved five of its 747-400's following the fleet's retirement during the COVID-19 pandemic, although only four now remain.^{[citation needed]}
- G-BYGC, the first of British Airways' three retrojets and decorated with the British Overseas Airways Corporation livery was on display at Bro Tathan Airfield, within the Bro Tathan Business Park at St Athan, Vale of Glamorgan, Wales.^[91]^[92] G-BYGC arrived at Bro Tathan for preservation on 11 December 2020.^[93] By May 2023, however, the aircraft was in danger of being scrapped.^[94] By August 2023, the dismantling of the aircraft was confirmed.^[95]
- G-BNLY City of Swansea, the second of British Airways' three retrojets and wearing the classic Landor Associates livery used from the 1980s to the late 1990s is on display at Dunsfold Aerodrome, joining 747-400 G-CIVW and 747-200 G-BDXJ as a filming location. The announcement of its preservation was made at the same time as that of G-BYGC, meaning that as of December 2020, all three of BA's heritage-liveried 747s have been preserved.^[96] G-BNLY arrived at Dunsfold on 5 December 2020 after a ferry flight from Cardiff.^[97]
- G-CIVB, the third of three 747-400 retrojets formerly operated by British Airways, is on display at Cotswold Airport in Kemble, Gloucestershire in the United Kingdom. The aircraft, which was the joint last of BA's 747-400s to leave London Heathrow alongside G-CIVY, arrived at Kemble on 8 October 2020. G-CIVB is decorated with the Negus livery used by the airline during the 1970s and early 1980s, and has been modified for use as an events centre.^[98]^[99]^[100]
- G-CIVW, an ex-British Airways 747-400, arrived at Dunsfold Aerodrome, Surrey in the United Kingdom on 22 October 2020 for preservation after a final ferry flight from Cardiff. The aircraft, which wears the Chattam Dockyard livery joins the aerodrome's Boeing 747-200, G-BDXJ, for use as a filming location and trainer aircraft.^[101]^[102]^[103]
- G-BYGA, one of British Airways last 747-400's used for flying, was retired on 8 September 2020.^[104] The cockpit and partial upper deck was converted into an event space and flight simulator at the Barton City Airport known as 'The Deck' in August 2022.^{[citation needed]}
HS-STA, A former Orient Thai Boeing 747-400 was converted into a cafe and restaurant in Bangkok's Lat Krabang district.^[105] The airplane originally belonged to United Airlines, registered N187UA.^[106]
HS-STB, A former Orient Thai Boeing 747-400 has a fuselage without wing preserved at Flight of Happiness restaurant in Guanyin District, Taoyuan, Taiwan.^{[citation needed]}
HS-TGR Siriwatthana, A former Thai Airways 747-400 was purchased by a Thai businessman named Somchai Phukieow in July 2018 and had it shipped to his home in Chai Nat Province, Thailand^[107] The aircraft had its engines removed and the titles painted over, but is otherwise unchanged from its time in active service.
HS-TGT Watthanothai, A former Thai Airways 747-400, has been placed on static display at Chic Chic Market in Nong Khai, Thailand, alongside ex-Las Vegas Sands Lockheed L-1011 TriStar N388LS.^{[citation needed]}

Specifications

Model	747-400^[108]	747-400ER^[108]	747-400F^[109]	747-400ERF^[109]
Cockpit crew	Two
Capacity	416 (23F @ 61" + 80J @ 39" + 313Y @ 32")		274,100 lb (124,330 kg)	273,400 lb (124,012 kg)
Unit Load Devices	30 LD1/LD3	28 LD1/LD3	+ 2 LD1 + 30 pallets (96" × 125") on Main deck
Exit limit^[110]	550/660^[a]
Overall length	231 ft 10 in (70.66 m)
Wing	211 ft 5 in (64.44 m) span, 5,650 sq ft (525 m²) area,^[111] 7.91 aspect ratio
Overall height	63 ft 8 in (19.41 m)
Max. takeoff weight	875,000 lb (396,893 kg)	910,000 lb (412,769 kg)	875,000 lb (396,893 kg)	910,000 lb (412,769 kg)
Operating empty weight	PW: 404,600 lb (183,523 kg)	PW: 412,300 lb (187,016 kg)	GE: 360,900 lb (163,701 kg)	GE: 361,600 lb (164,019 kg)
Fuel capacity	57,285 US gal (216,850 L)	63,705 US gal (241,150 L)	53,985 US gal (204,360 L)
Cruise	Mach 0.855 (490 kn; 908 km/h; 564 mph)		Mach 0.845 (485 kn; 898 km/h; 558 mph)
Flight envelope^[110]	Mach 0.92 (528 kn; 977 km/h; 607 mph) airspeed limit, 45,100 ft (13,700 m) maximum altitude
Takeoff field length^[b]	9,700 ft (2,955 m)	10,700 ft (3,260 m)	9,550 ft (2,910 m)	10,700 ft (3,260 m)
Range	7,285 nmi (13,490 km; 8,385 mi)^[c]	7,585 nmi (14,045 km; 8,730 mi)^[c]	4,455 nmi (8,250 km; 5,125 mi)^[d]	4,985 nmi (9,230 km; 5,735 mi)^[e]
Engines (× 4)	PW4000 / GE CF6 / RR RB211	PW4000 / GE CF6^[112]	PW4000 / GE CF6 / RR RB211	PW4000 / GE CF6
Thrust (× 4)	56,500–63,300 lbf (251–282 kN)	62,100–63,300 lbf (276–282 kN)	56,400–63,300 lbf (251–282 kN)	62,100–63,300 lbf (276–282 kN)

^ 550 main deck, 660 combined main and upper decks.
^ SL, 86 °F (30 °C), MTOW.
^ ^a ^b PW engines, 416 pax.
^ max. payload, max. TOW, GE Engines
^ max. payload, max. TOW, PW engines

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Dorr, Robert F. (2002). Airliner Tech Series: Boeing 747-400. North Branch, MN: Specialty Press Publishers. ISBN 1-58007-055-8.
Norris, Guy; Wagner, Mark (1999). "747: Advancing the Legend". Modern Boeing Jetliners. Osceola, Wisconsin: Zenith Imprint. ISBN 0-7603-0717-2.

External links

Media related to Boeing 747-400 at Wikimedia Commons

747-400 page on Boeing.com
747-400 page on Airliners.net
Boeing 747 cargo specifications
"Passenger version" (PDF). Boeing. 2010.
"Freighter version" (PDF). Boeing. 2010.

[111] 550 main deck, 660 combined main and upper decks.

[113] SL, 86 °F (30 °C), MTOW.

[PW416pax-114] PW engines, 416 pax.

[115] x. payload, max. TOW, GE Engines

[116] x. payload, max. TOW, PW engines

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[6] Boeing 747-300 Archived September 2, 2017, at the Wayback Machine. Airliners.net

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[d24-8] Dorr 2002, p. 24.

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@@ Line 3: / Line 3: @@
 {{Use American English|date=April 2022}}
 <!-- This article is a part of the [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout, and guidelines. -->
-{|{{Infobox aircraft begin
+{{Infobox aircraft
 | name = Boeing 747-400
-| image = EI-XLH (8125236147).jpg<!-- In flight images are preferred for aircraft. Please do not change this image without a talk page discussion. -->
+| image = File:Qantas_Boeing_747-400ER_MEL_Nazarinia.jpg<!-- In flight images are preferred for aircraft. Please do not change this image without a talk page discussion. -->
-| caption = A 747-400 of [[Transaero]], its former passenger operator. As of 2024, this aircraft is currently in service with [[Rossiya Airlines]].<ref name=ps747/>
+| caption = A 747-400ER of [[Qantas]], seen at [[Melbourne Airport]] in 2011.
-| alt = A large white and blue four-engine jet airliner with union tail fin, with landing gear extended
+| alt = A large white and red four-engine jet airliner with union tail fin, with landing gear extended
-}}
-{{Infobox aircraft type
 | type = [[Wide-body aircraft|Wide-body airliner]]
-| national origin = United States
+| national_origin = United States
 | manufacturer = [[Boeing]]
 | designer =
-| first flight = April 29, 1988
+| first_flight = April 29, 1988
-| introduced = February 9, 1989, with [[Northwest Airlines]]
+| introduction = February 9, 1989, with [[Northwest Airlines]]
 | retired =
 | status = In limited passenger service, in cargo service<!-- See Produced field for production status -->
-| primary user = [[Atlas Air]] <!-- Limit one (1) primary user. Top 4 users listed in 'primary user' and 'more users' fields based on number of their fleets. -->
+| primary_user = [[Atlas Air]] <!-- Limit one (1) primary user. Top 4 users listed in 'primary user' and 'more users' fields based on number of their fleets. -->
-| more users = {{ubl <!-- This field is limited to THREE 'more users'. -->
+| more_users = {{ubl <!-- This field is limited to THREE 'more users'. -->
   | [[Lufthansa]]
   | [[UPS Airlines]]
@@ Line 29: / Line 27: @@
   | Combi versions: 1989&ndash;2002
  }}
-| number built = 694<ref name="747_O_D_summ" />
+| number_built = 694<ref name="747_O_D_summ" />
-| developed from = [[Boeing 747-300]]
+| developed_from = [[Boeing 747-300]]
-| variants with their own articles = {{ubl
+| variants = {{ubl
   | [[Boeing YAL-1]]
   | [[Boeing 747 Large Cargo Freighter]]
   | [[747 Supertanker]]
  }}
-| developed into = [[Boeing 747-8]]
+| developed_into = [[Boeing 747-8]]
 }}
-|}
 The '''Boeing 747-400''' is a large, long-range [[Wide-body aircraft|wide-body airliner]] produced by [[Boeing Commercial Airplanes]], an advanced variant of the initial [[Boeing 747]].
 <!--Development-->
-The "Advanced Series 300" was announced at the September 1984 [[Farnborough Airshow]], targeting a 10% cost reduction with more efficient engines and {{Convert|1000|nmi|abbr=~|lk=in}} of additional range. [[Northwest Airlines]] became the first customer with an order for 10 aircraft on October 22, 1985. The first 747-400 was rolled out on January 26, 1988, and made its [[maiden flight]] on April 29, 1988. [[Type certification]] was received on January 9, 1989, and it entered service with NWA on February 9, 1989.
+The "Advanced Series 300" was announced at the September 1984 [[Farnborough Airshow]], targeting a 10% cost reduction with more efficient engines and {{Convert|1000|nmi|abbr=~|lk=in}} of additional range. [[Northwest Airlines]] became the first customer with an order for 10 aircraft on October 22, 1985. The first 747-400 was rolled out on January 26, 1988, and made its [[maiden flight]] on April 29, 1988. [[Type certification]] was received on January 9, 1989, and it entered service with Northwest on February 9, 1989.
 <!--Design-->
@@ Line 51: / Line 48: @@
 <!--Operators-->
-With 694 delivered over the course of 20 years from 1989 to 2009,<ref name="FI_last-400" /> it was the best-selling 747 variant. Its closest competitors were the smaller [[McDonnell Douglas MD-11]] trijet and [[Airbus A340]] quadjet. It has been superseded by the stretched and improved [[Boeing 747-8]], introduced in October 2011. In the late 2010s, older 747-400 passenger aircraft were being phased out by airlines in favor of long-range, wide-body twinjet aircraft, such as the [[Boeing 777]] and [[Airbus A350]].
+With 694 delivered over the course of 20 years from 1989 to 2009,<ref name="FI_last-400" /> it was the best-selling 747 variant. Its closest competitors were the smaller [[McDonnell Douglas MD-11]] trijet and [[Airbus A340]] quadjet. It has been superseded by the stretched and improved [[Boeing 747-8]], introduced in October 2011. Beginning the late 2010s, 747-400 passenger aircraft began being phased out by airlines in favor of long-range, wide-body twinjet aircraft, such as the [[Boeing 777]] and [[Airbus A350]].
 ==Development==
@@ Line 83: / Line 80: @@
 ===Service entry and operations===
-[[File:Northwest Airlines Boeing 747-400 Spijkers.jpg|thumb|[[Northwest Airlines]] placed the 747-400 into service in February 1989.|alt=Side view of four-engine jet climbing in the sky.]]
+[[File:N661US 1 B747-451 Northwest A-l KIX 11JAN99 (6559458855).jpg|thumb|[[Northwest Airlines]] placed the 747-400 into service in February 1989. This aircraft is the prototype of 747-400|alt=Side view of four-engine jet climbing in the sky.]]
 The first 747-400 ([[N661US]]) was delivered to launch customer [[Northwest Airlines]].<ref name=DeltaMuseum>{{cite web|url=https://www.deltamuseum.org/exhibits/exhibits/aircraft/boeing-747-400|title=Boeing 747-400|website=www.deltamuseum.org|access-date=November 30, 2015|archive-date=December 8, 2015|archive-url=https://web.archive.org/web/20151208133235/https://www.deltamuseum.org/exhibits/exhibits/aircraft/boeing-747-400|url-status=live}} "Registration No.: N401PW as Boeing test plane; changed to '''''N661US''''' for delivery to Northwest."</ref> This jet became known for an incident on [[Northwest 85|Northwest Flight 85]] caused by a rudder hardover.<ref name=NTSBEvent>{{Cite web|url=https://app.ntsb.gov/pdfgenerator/ReportGeneratorFile.ashx?EventID=20021018X05344&AKey=1&RType=HTML&IType=IA|title=Aviation Incident Final Report|publisher=[[National Transportation Safety Board]]|id=ANC03IA001|date=2004-06-29|website=app.ntsb.gov|access-date=2019-11-12|archive-date=2020-09-15|archive-url=https://web.archive.org/web/20200915181041/https://app.ntsb.gov/pdfgenerator/ReportGeneratorFile.ashx?EventID=20021018X05344&AKey=1&RType=HTML&IType=IA|url-status=live}} [https://web.archive.org/web/20121129161812/https://www.ntsb.gov/aviationquery/brief2.aspx?ev_id=20021018X05344&ntsbno=ANC03IA001&akey=1 Originally retrieved] on December 23, 2012. "Registration: '''''N661US'''''...the captain said the airplane was at a cruise altitude of 35,000 feet with the autopilot engaged, when it abruptly rolled into a 30 to 40 degree left bank."</ref> N661US was later sold to Delta Airlines when Northwest merged with it. N661US later became preserved at the Delta Flight Museum. This was the twentieth anniversary of the 747-100's first flight. On May 31, 1989, [[Singapore Airlines]] operated the first international service using a 747-400, on a flight from Singapore to London.<ref name=dorr20>{{harvnb|Dorr|2002|p=20}}</ref>
@@ Line 93: / Line 90: @@
 ===Further developments===
 [[File:Qantas Boeing 747-438ER Spijkers.jpg|thumb|[[Qantas]] placed the Boeing 747-400ER into service in November 2002|alt=Side view of four-engine jet climbing in the sky.]]
+[[File:Wunala Dreaming on short finals at London Heathrow Airport.jpg|thumb|[[Qantas]] also painted one their 747-400ERs in the "Wunala Dreaming" livery.]]
 The extended range freighter (ERF) entered service in October 2002. The next month, the extended range (ER) passenger version entered service with [[Qantas]], the only airline ever to order the passenger version of the 747-400ER. Qantas initially used the 747-400ER for the [[Melbourne Airport|Melbourne]] to [[Los Angeles International Airport|Los Angeles]] and [[Dallas/Fort Worth International Airport|Dallas]] to Sydney route allowing the completion of the flight with full passenger load and cargo. Prior to the 747-400ER, Qantas would complete such flights by blocking out 'E' zone of the cabin and limiting passenger numbers and cargo. The 747-400ER featured the ''Boeing Signature Interior'', which was later made available on the 747-400 (either as a retrofit on existing 747-400s or factory installation on new frames).
@@ Line 114: / Line 112: @@
 Prior to COVID-19, [[British Airways]], the largest passenger 747-400 operator then, announced that they would've phased out their 747-400 fleet in February 2024, replacing it with the Airbus A350-1000. [[Lufthansa]] was to retire their 747-400 fleet in 2025 as they were to be replaced by the Boeing 777x and the Boeing 747-8i. [[KLM]] planned to retire their 747-400 Combi and Passenger fleet in 2020 as they were being replaced by the Boeing 777-300ER, the Boeing 787-10, and the Airbus A350-900. However, KLM announced it plans to retire its last Boeing 747-400 by January 1, 2021, instead of 2020 due to delivery delays for the new wide-body twin jets.{{citation needed|date=March 2024}}
-The global [[COVID-19 pandemic]] hastened the retirement of many remaining passenger Boeing 747-400s due to a sharp decline in passenger traffic.<ref>{{cite web |last1=Pallini |first1=Thomas |title=Even more iconic planes are disappearing from the skies earlier than planned as the coronavirus continues to wreak airline havoc |url=https://www.businessinsider.com/coronavirus-havoc-forces-airlines-to-retire-iconic-planes-sooner-2020-3 |website=www.businessinsider.com |publisher=Business Insider |access-date=16 May 2021 |archive-date=May 15, 2021 |archive-url=https://web.archive.org/web/20210515205005/https://www.businessinsider.com/coronavirus-havoc-forces-airlines-to-retire-iconic-planes-sooner-2020-3 |url-status=live }}</ref> For instance, KLM retired its Boeing 747-400 Combi and Passenger fleets in March 2020. Qantas announced the retirement of its 747-400 and 747-400ER fleet by the end of 2020, with the Boeing 787-9 Dreamliner taking its place. China Airlines also announced that they will be retiring their remaining four passenger Boeing 747-400s by the end of 2020 due to the COVID-19 pandemic (which were delivered between 2004 and 2005, operating on flights within Asia) with the Airbus A350-900 and Boeing 777-300ER taking over all high-volume routes and all Asian International routes. However, China Airlines didn't retire its last passenger Boeing 747-400 until February 2021. [[British Airways]] retired its remaining 31 Boeing 747-400s 4 years ahead of the original February 2024 deadline.<ref>{{Cite web|last=Harding|first=Nick|date=2020-07-16|title=British Airways confirms Boeing 747 retirement|url=https://ukaviation.news/british-airways-confirms-boeing-747-retirement/|access-date=2020-07-16|website=UK Aviation News|language=en-GB|archive-date=July 16, 2020|archive-url=https://web.archive.org/web/20200716232655/https://ukaviation.news/british-airways-confirms-boeing-747-retirement/|url-status=live}}</ref> [[Virgin Atlantic]] also retired their remaining leisure fleet 747-400s in May 2020 citing the COVID-19 pandemic - the fleet was due to retire in 2021.<ref>{{Cite web|url=https://www.virgin.com/about-virgin/latest/five-things-you-didnt-know-about-virgin-atlantics-boeing-747s|title = Five things you didn't know about Virgin Atlantic's Boeing 747s &#124; Virgin}}</ref> As of September, 2021, there were just 42 passenger 747-400 in operation (10 actively flying, 32 in storage) across 10 carriers worldwide. Lufthansa and Air China had plans to resume flying some of their stored aircraft by October, 2021.<ref>{{Cite web|date=2021-09-10|title=Revealed: The World's Biggest 747-400 Passenger Operators In 2021|url=https://simpleflying.com/worlds-biggest-747-400-operators-2021/|access-date=2021-09-25|website=Simple Flying|language=en-US|archive-date=September 11, 2021|archive-url=https://web.archive.org/web/20210911065830/https://simpleflying.com/worlds-biggest-747-400-operators-2021/|url-status=live}}</ref>{{Better source needed|date=April 2024|reason=[[WP:Simple Flying]] is unreliable}}
+The global [[COVID-19 pandemic]] hastened the retirement of many remaining passenger Boeing 747-400s due to a sharp decline in passenger traffic.<ref>{{cite web |last1=Pallini |first1=Thomas |title=Even more iconic planes are disappearing from the skies earlier than planned as the coronavirus continues to wreak airline havoc |url=https://www.businessinsider.com/coronavirus-havoc-forces-airlines-to-retire-iconic-planes-sooner-2020-3 |website=www.businessinsider.com |publisher=Business Insider |access-date=16 May 2021 |archive-date=May 15, 2021 |archive-url=https://web.archive.org/web/20210515205005/https://www.businessinsider.com/coronavirus-havoc-forces-airlines-to-retire-iconic-planes-sooner-2020-3 |url-status=live }}</ref> For instance, KLM retired its Boeing 747-400 Combi and Passenger fleets in March 2020. Qantas announced the retirement of its 747-400 and 747-400ER fleet by the end of 2020, with the Boeing 787-9 Dreamliner taking its place. China Airlines also announced that they will be retiring their remaining four passenger Boeing 747-400s by the end of 2020 due to the COVID-19 pandemic (which were delivered between 2004 and 2005, operating on flights within Asia) with the Airbus A350-900 and Boeing 777-300ER taking over all high-volume routes and all Asian International routes. However, China Airlines didn't retire its last passenger Boeing 747-400 until February 2021. [[British Airways]] retired its remaining 31 Boeing 747-400s 4 years ahead of the original February 2024 deadline.<ref>{{Cite web|last=Harding|first=Nick|date=2020-07-16|title=British Airways confirms Boeing 747 retirement|url=https://ukaviation.news/british-airways-confirms-boeing-747-retirement/|access-date=2020-07-16|website=UK Aviation News|language=en-GB|archive-date=July 16, 2020|archive-url=https://web.archive.org/web/20200716232655/https://ukaviation.news/british-airways-confirms-boeing-747-retirement/|url-status=live}}</ref> [[Virgin Atlantic]] also retired their remaining leisure fleet 747-400s in May 2020 citing the COVID-19 pandemic - the fleet was due to retire in 2021.<ref>{{Cite web|url=https://www.virgin.com/about-virgin/latest/five-things-you-didnt-know-about-virgin-atlantics-boeing-747s|title = Five things you didn't know about Virgin Atlantic's Boeing 747s &#124; Virgin}}</ref> As of September, 2021, there were just 42 passenger 747-400 in operation (10 actively flying, 32 in storage) across 10 carriers worldwide. Lufthansa and Air China had plans to resume flying some of their stored aircraft by October, 2021.{{citation needed|date=June 2024}}
-On 29 April 2022, [[Air India]] retired it's remaining 747-400 planes in its fleet, after the [[Directorate General of Civil Aviation (India)|Directorate General of Civil Aviation]] deregistered them. <ref>{{cite web|url= https://simpleflying.com/air-india-boeing-747-get-deregistered/|title= End Of The Road: Air India's Boeing 747s Deregistered By Regulator|date= April 28, 2022}}</ref>{{Better source needed|date=April 2024|reason=[[WP:Simple Flying]] is unreliable}} In March 2024, [[Asiana Airlines]] announced to retire their sole remaining 747-400, leaving [[Air China]] as the last scheduled passenger operator in Asia.<ref>[https://www.flugrevue.de/zivil/passagier-jumbo-hl7428-asiana-schickt-ihr-boeing-747-einzelstueck-in-rente/ flugrevue.de - "Asiana to send off its sole Boeing 747"] (German) 2 March 2024</ref>
+On 29 April 2022, [[Air India]] retired its remaining 747-400 planes in its fleet, after the [[Directorate General of Civil Aviation (India)|Directorate General of Civil Aviation]] deregistered them.{{citation needed|date=June 2024}} In March 2024, [[Asiana Airlines]] announced to retire their sole remaining 747-400, leaving [[Air China]] as the last scheduled passenger operator in Asia.<ref>[https://www.flugrevue.de/zivil/passagier-jumbo-hl7428-asiana-schickt-ihr-boeing-747-einzelstueck-in-rente/ flugrevue.de - "Asiana to send off its sole Boeing 747"] (German) 2 March 2024</ref>
 ==Design==
@@ Line 145: / Line 143: @@
 ===747-400F===
-[[File:Nippon Cargo Airlines, Boeing 747-400F, JA03KZ - NRT.jpg|thumb|[[Nippon Cargo Airlines]] 747-400F]]
+[[File:ACT Airlines Boeing 747-412F (TC-MCL) 11 January 2017.jpg|thumb|
+A Boeing 747-400F of [[Turkish Cargo]]]]
 The 747-400F (Freighter) is an all freight version of the 747-400. While using the updated systems and wing design of the passenger versions, it features the original short upper deck found on the classic 747s to reduce weight. The 747-400F has a maximum takeoff weight of {{convert|875,000|lbs|-3}} and a maximum payload of {{convert|274,100|lbs|-3}}. The -400F can be easily distinguished from the passenger -400 by its shorter upper-deck hump and lack of windows along the main deck.{{citation needed|date=March 2024}}
@@ Line 153: / Line 153: @@
 ===747-400M===
-[[File:Air China Boeing 747-400; B-2468@LAX;11.10.2011 623lb (6311925497).jpg|thumb|An [[Air China]] 747-400M "Combi"in 2011, with passenger windows and aft cargo door.]]
+[[File:Air China Boeing 747-400; B-2468@LAX;11.10.2011 623lb (6311925497).jpg|thumb|[[Air China]] 747-400M "Combi" in 2011 with aft cargo door]]
 The 747-400M (a passenger/freight or "Combi" variant originally designated as 747-400BC) first flew on June 30, 1989, and entered service with [[KLM]] on September 12, 1989. Based on the successful Combi versions of the Classic 747s, the 747-400M has a large cargo door fitted to the rear of the fuselage for freight loading to the aft main deck cargo hold. A locked partition separates the cargo area from the forward passenger cabin, and the -400M also features additional fire protection, a strengthened main deck floor, a roller-conveyor system, and passenger-to-cargo conversion equipment.<ref>{{harvnb|Dorr|2002|pp=55–57.}}</ref> The last 747-400M was delivered to KLM on April 10, 2002.<ref name=":1">{{Cite web|url=http://www.boeing.com/commercial/747family/background.html|title=Boeing: Commercial Airplanes - 747 - About the 747 Family|url-status=dead|archive-url=https://web.archive.org/web/20060615032630/http://www.boeing.com/commercial/747family/background.html|archive-date=June 15, 2006|access-date=November 28, 2016}}</ref> Boeing sold 61 747-400M aircraft, which was similar to earlier 747 "Combi" versions (78 747-200M, 21 747-300M).
-KLM was the last commercial 747-400M operator. KLM  initially planned to retire their 747-400M by January 1, 2021, however the Boeing 747-400M was instead retired by March 27, 2020, as [[Air France-KLM]] announced in early March 2020 to retire all remaining passenger Boeing 747-400s of KLM (including all KLM Boeing 747-400M aircraft) immediately due to reduced air travel demand caused by the [[COVID-19 pandemic]], although, due to a global shortage in air cargo capacity, three KLM 747-400Ms were temporarily reactivated after just a week to operate cargo-only flights to Asia.{{cn|date=April 2024}} As of 2024, [[Air Atlanta Icelandic]], an Icelandic cargo and charter passenger airline, operates one Boeing 747-400M.{{cn|date=April 2024}}
+KLM was the last commercial 747-400M operator. KLM  initially planned to retire their 747-400M by January 1, 2021, however the Boeing 747-400M was instead retired by March 27, 2020, as [[Air France-KLM]] announced in early March 2020 to retire all remaining passenger Boeing 747-400s of KLM (including all KLM Boeing 747-400M aircraft) immediately due to reduced air travel demand caused by the [[COVID-19 pandemic]], although, due to a global shortage in air cargo capacity, three KLM 747-400Ms were temporarily reactivated after just a week to operate cargo-only flights to Asia.{{citation needed|date=April 2024}} As of 2024, [[Air Atlanta Icelandic]], an Icelandic cargo and charter passenger airline, operates one Boeing 747-400M.{{citation needed|date=April 2024}}
 === 747-400D ===
@@ Line 181: / Line 181: @@
 {{Clear}}
+=== Freighter conversions ===
-===747-400 Boeing Converted Freighter===
-[[File:Cargo Boeing 747-428(BCF) of National Airlines cropped.jpg|thumb|A Boeing 747-400BCF Boeing Converted Freighter of National Airlines (N8). This aircraft crashed in Afghanistan in 2013 while operating as [[National Airlines Flight 102]].]]
+[[File:Cargo Boeing 747-428(BCF) of National Airlines cropped.jpg|thumb|A Boeing 747-400BCF of National Airlines. This aircraft crashed in Afghanistan in 2013 while operating as [[National Airlines Flight 102]].]]
-The 747-400BCF (Boeing Converted Freighter), formerly known as the 747-400SF (Special Freighter), is a conversion program for standard passenger 747-400s. The project was launched in 2004 with conversions by approved contractors such as [[HAECO]], KAL Aerospace and [[SIA Engineering Company]]. The first Boeing 747-400BCF was redelivered to [[Cathay Pacific|Cathay Pacific Cargo]] and entered service on December 20, 2005.<ref>{{cite web |last=Sutton |first=Richard |url=https://www.yesterdaysairlines.com/airline-history-blog/new-life-to-old-jumbos-747-400bcf-and-bdsfs/ |title=New Life to Old Jumbos: 747-400BCF and BDSFs |website=Yesterday's Airlines |date=July 7, 2017 |access-date=September 7, 2021 }}</ref> Cathay retired the 747-400BCF in 2017 after 11 years of service.
+The 747-400BCF (Boeing Converted Freighter), formerly known as the 747-400SF (Special Freighter), is a conversion program for standard passenger 747-400 aircraft. The project was launched in 2004 with conversions by approved contractors such as [[HAECO]], KAL Aerospace and [[SIA Engineering Company]]. The first Boeing 747-400BCF was redelivered to [[Cathay Pacific|Cathay Pacific Cargo]] and entered service on December 20, 2005.<ref>{{cite web |last=Sutton |first=Richard |url=https://www.yesterdaysairlines.com/airline-history-blog/new-life-to-old-jumbos-747-400bcf-and-bdsfs/ |title=New Life to Old Jumbos: 747-400BCF and BDSFs |website=Yesterday's Airlines |date=July 7, 2017 |access-date=September 7, 2021 }}</ref> Cathay retired the 747-400BCF in 2017 after 11 years of service.
-The 747-400BDSF (BeDek Special Freighter) is another passenger-to-freighter conversion, carried out by [[Israel Aerospace Industries]] (IAI). The first 747-400BDSF was redelivered to Air China Cargo in August, 2006.<ref>{{cite web |last=Pocock |first=Chris |url=https://www.ainonline.com/aviation-news/air-transport/2006-12-14/bedek-boosts-747-freighter-conversions |title=Bedek boosts 747 freighter conversions |website=AINonline |publisher=The Convention News Company |date=December 14, 2006 |access-date=May 18, 2018 |archive-date=May 18, 2018 |archive-url=https://web.archive.org/web/20180518200400/https://www.ainonline.com/aviation-news/air-transport/2006-12-14/bedek-boosts-747-freighter-conversions |url-status=live }}</ref> Several Boeing 747-400Ms of [[EVA Air]] have been converted as BDSF model after retiring from passenger service.<ref>{{cite web |last=Harris |first=David |url=https://cargofacts.com/eva-air-747-400-bdsf/ |title=Eva Air 747-400 BDSF |website=Cargo Facts |publisher=Royal Media |date=January 25, 2011 |access-date=May 18, 2018 |archive-date=May 18, 2018 |archive-url=https://web.archive.org/web/20180518200725/https://cargofacts.com/eva-air-747-400-bdsf/ |url-status=live }}</ref>
+The 747-400BDSF (BeDek Special Freighter) is another passenger-to-freighter conversion, carried out by [[Israel Aerospace Industries]] (IAI). The first 747-400BDSF was redelivered to Air China Cargo in August 2006.<ref>{{cite web |last=Pocock |first=Chris |url=https://www.ainonline.com/aviation-news/air-transport/2006-12-14/bedek-boosts-747-freighter-conversions |title=Bedek boosts 747 freighter conversions |website=AINonline |publisher=The Convention News Company |date=December 14, 2006 |access-date=May 18, 2018 |archive-date=May 18, 2018 |archive-url=https://web.archive.org/web/20180518200400/https://www.ainonline.com/aviation-news/air-transport/2006-12-14/bedek-boosts-747-freighter-conversions |url-status=live }}</ref> Several Boeing 747-400M "combi" aircraft operated by [[EVA Air]] were also converted to pure cargo aircraft by IAI.<ref>{{cite web |last=Harris |first=David |url=https://cargofacts.com/eva-air-747-400-bdsf/ |title=Eva Air 747-400 BDSF |website=Cargo Facts |publisher=Royal Media |date=January 25, 2011 |access-date=May 18, 2018 |archive-date=May 18, 2018 |archive-url=https://web.archive.org/web/20180518200725/https://cargofacts.com/eva-air-747-400-bdsf/ |url-status=live }}</ref>
 Neither the 747-400BCF or the 747-400BDSF has a nose cargo door; freight can only be loaded through the side cargo door.
-The demand for converted 747-400 freighters declined in the early 2010s, due to the availability of belly cargo capacity on more efficient passenger wide-body twin jets, and new orders for Boeing 747-8F and 777F freighters. Approximately 79 747-400 aircraft were converted before the programs were terminated; 50 of these converted aircraft were 747-400BCF, with the remaining 29 being 747-400BDSF. Boeing announced the end of their conversion program in 2016, although conversions had ceased years earlier with no orders after 2012.<ref>{{cite web |last=Netz |first=Jacob |url=http://www.aircargopedia.com/passengertofreightpg.htm/ |title=Passenger to Freighter Conversions |website=AirCargoPedia |publisher=American Friendship World Air Cargo Corporation |access-date=September 7, 2021 }}</ref> Some converted freighters, that had been retired to desert storage, were returned to active service due to the increase in demand for air cargo capacity in the 2020-2021 [[COVID-19 pandemic|COVID-19]] era.
+The demand for converted 747-400 freighters declined in the early 2010s, due to the availability of belly cargo capacity on more efficient passenger wide-body twinjets, and new orders for Boeing 747-8F and 777F freighters. Approximately 79 747-400 aircraft were converted before the programs were terminated; 50 of these aircraft were converted by the BCF program, with the remaining 29 under the BDSF offering. Boeing announced the end of the BCF program for the 747-400 in 2016, although conversions had ceased years earlier with no orders after 2012.<ref>{{cite web |last=Netz |first=Jacob |url=http://www.aircargopedia.com/passengertofreightpg.htm/ |title=Passenger to Freighter Conversions |website=AirCargoPedia |publisher=American Friendship World Air Cargo Corporation |access-date=September 7, 2021 }}</ref>
 ===747 Large Cargo Freighter===
@@ Line 202: / Line 203: @@
 ==Government, military and other variants==
-* '''C-33''': Proposed U.S. [[Military transport aircraft|military transport]] version of the 747-400F, intended as an alternative to  further purchases of the [[McDonnell Douglas C-17 Globemaster III]] during the 1990s Non-Developmental Airlift Aircraft (NDAA) program. The C-33 cost less and had greater range, although it could not use austere runways or handle outsize military equipment and had a higher expected operating cost. The plan was canceled in favor of the purchase of more C-17s.<ref>Tirpak, John A. [http://www.airforce-magazine.com/MagazineArchive/Pages/1996/February%201996/0296airlift.aspx "Airlift Moves Up and Out"] {{Webarchive|url=https://web.archive.org/web/20110209065443/http://www.airforce-magazine.com/MagazineArchive/Pages/1996/February%201996/0296airlift.aspx |date=February 9, 2011 }}. ''Air Force Magazine'', February 1996.</ref> In the early 2000s, An Air Power Australia analysis deck (an independent think tank not affiliated with the [[RAAF]] or Australia’s [[Department of Defence (Australia)|Department of Defence]]) looked at modifying the 747-400 platform for use as KC-33 tankers but ultimately abandoned it in favor of the [[Boeing KC-767|767-based tanker]].<ref name="APA_KC-33">[https://web.archive.org/web/20050716004716/http://www.ausairpower.net/APA-2005-02.pdf "KC-33A: Closing the Aerial Refuelling and Strategic Air Mobility Gaps (PDF)."] ''Air Power Australia Analysis APA-2005-02'', April 16, 2005. Retrieved: December 17, 2007.</ref>
+* '''C-33''': Proposed U.S. [[Military transport aircraft|military transport]] version of the 747-400F, intended as an alternative to  further purchases of the [[McDonnell Douglas C-17 Globemaster III]] during the 1990s Non-Developmental Airlift Aircraft (NDAA) program. The C-33 cost less and had greater range, although it could not use austere runways or handle outsize military equipment and had a higher expected operating cost. The plan was canceled in favor of the purchase of more C-17s.<ref>Tirpak, John A. [http://www.airforce-magazine.com/MagazineArchive/Pages/1996/February%201996/0296airlift.aspx "Airlift Moves Up and Out"] {{Webarchive|url=https://web.archive.org/web/20110209065443/http://www.airforce-magazine.com/MagazineArchive/Pages/1996/February%201996/0296airlift.aspx |date=February 9, 2011 }}. ''Air Force Magazine'', February 1996.</ref> In the early 2000s, An Air Power Australia analysis deck (an independent think tank not affiliated with the [[RAAF]] or Australia's [[Department of Defence (Australia)|Department of Defence]]) looked at modifying the 747-400 platform for use as KC-33 tankers but ultimately abandoned it in favor of the [[Boeing KC-767|767-based tanker]].<ref name="APA_KC-33">[https://web.archive.org/web/20050716004716/http://www.ausairpower.net/APA-2005-02.pdf "KC-33A: Closing the Aerial Refuelling and Strategic Air Mobility Gaps (PDF)."] ''Air Power Australia Analysis APA-2005-02'', April 16, 2005. Retrieved: December 17, 2007.</ref>
 * '''[[Boeing YAL-1|YAL-1]]''': "Airborne Laser" carrier based on a 747-400F for the [[United States Air Force]]. The aircraft was heavily modified to carry a nose-mounted turret and [[Chemical Oxygen Iodine Laser]] (COIL) equipment in order to destroy [[Intercontinental Ballistic Missile]]s. The aircraft was retired in 2012 after cancellation of the program funding.<ref>{{cite web |url=http://www.flightglobal.com/blogs/aircraft-pictures/boeing-yal-1-airborne-laser/ |title=Boeing YAL1 Airborne Laser - Flight Image of the Day |access-date=2013-08-13 |url-status=dead |archive-url=https://web.archive.org/web/20131020012544/http://www.flightglobal.com/blogs/aircraft-pictures/boeing-yal-1-airborne-laser/ |archive-date=October 20, 2013 |df=mdy-all }}</ref>
 *'''Cosmic Girl''': A former [[Virgin Atlantic]] 747-400 named ''[[Cosmic Girl (aircraft)|Cosmic Girl]]'' is used by [[Virgin Galactic]] as the [[air launch to orbit]] launcher for [[LauncherOne]], an [[orbital rocket]].<ref>{{cite magazine|url=https://www.wired.co.uk/news/archive/2015-12/04/virgin-galactic-747-satellite-launcher|title=How Virgin Galactic will launch satellites from an old 747|first=Michael|last=Rundle|magazine=Wired UK|access-date=August 24, 2017|archive-date=May 10, 2016|archive-url=https://web.archive.org/web/20160510015507/http://www.wired.co.uk/news/archive/2015-12/04/virgin-galactic-747-satellite-launcher|url-status=live}}</ref><ref>Jumbo for Virgin Galactic ''[[Airliner World]]'' February 2016 page 10</ref>
@@ Line 211: / Line 212: @@
 ===Current operators===
-{{As of|2024|3}}, there were 17 passenger and 213 cargo versions of the 747-400 in operation worldwide.<ref name=ps747>{{cite web| url = https://www.planespotters.net/operators/Boeing/747| title = Boeing 747 Operators|date=2 March 2024}}</ref>{{better source needed|date=May 2024}} The passenger operators are [[Lufthansa]] (8), [[Rossiya Airlines]] (5), [[Air China]] (3), and [[Mahan Air]] (1).<ref name=ps747/> As of August 2018, the largest cargo variant operators were [[Atlas Air]] (35), [[Kalitta Air]] (24) and [[Cargolux]] (16).<ref>{{Cite web|url=https://www.flightglobal.com/download?ac=67051|title=World Airline Census 2018|website=Flightglobal|language=en-GB|date=2018-08-21|first1=Dan |last1=Thisdell |first2=Rob |last2=Morris }}</ref>{{failed verification|date=September 2023}}{{update inline|date=March 2024}}
+{{As of|2024|3}}, there were 19 passenger and 213 cargo versions of the 747-400 in operation worldwide.{{Cn|date=September 2024}} The passenger operators are [[Lufthansa]] (8), [[Rossiya Airlines]] (5), [[Air China]] (3), [[Saudia]] (2) and [[Mahan Air]] (1).{{Cn|date=September 2024}} As of August 2018, the largest cargo variant operators were [[Atlas Air]] (35), [[Kalitta Air]] (24) and [[Cargolux]] (16).<ref>{{Cite web|url=https://www.flightglobal.com/download?ac=67051|title=World Airline Census 2018|website=Flightglobal|language=en-GB|date=2018-08-21|first1=Dan |last1=Thisdell |first2=Rob |last2=Morris }}</ref>{{failed verification|date=September 2023}}{{update inline|date=March 2024}}
 ===Deliveries===
@@ Line 415: / Line 416: @@
 The first hull loss of a 747-400 occurred on November 4, 1993, when [[China Airlines Flight 605]], flying from [[Taipei]] to Hong Kong's [[Kai Tak Airport]], touched down more than {{convert|2100|ft|m}} past the runway's displaced threshold during 20-knot (gusting to 38 knots) crosswinds. Combined with the disengagement of auto brakes and retracted speed brakes, manual braking and thrust reversal were not enough to prevent the aircraft from sliding into [[Victoria Harbour]]. No one was seriously injured, but the aircraft was written off.<ref name="AviationSafety">{{cite web|url=http://aviation-safety.net/database/record.php?id=19931104-0|title=ASN Aircraft accident Boeing 747-409 B-165 Hong Kong-Kai Tak International Airport (HKG)|first=Harro|last=Ranter|website=aviation-safety.net|access-date=May 14, 2010|archive-date=January 12, 2012|archive-url=https://web.archive.org/web/20120112212317/http://aviation-safety.net/database/record.php?id=19931104-0|url-status=live}}</ref> The type's second hull loss occurred on October 31, 2000, when [[Singapore Airlines Flight 006]], a 747-400 flying from Singapore to Los Angeles via [[Taipei]], rammed into construction equipment while attempting to take off from a closed runway at [[Chiang Kai-shek International Airport]] during [[Typhoon Xangsane (2000)|Typhoon Xangsane]]. The aircraft caught fire and was destroyed, killing 79 passengers and four crew members.<ref name="ASCReport">"{{usurped|[https://web.archive.org/web/20071128052243/http://www.airdisaster.com/reports/ntsb/ASCAAR-02-01.pdf Aircraft Accident Report ASC-AAR-02-04-001]}}: Crashed on a partially closed runway during takeoff Singapore Airlines Flight 006 Boeing 747-400, 9V-SPK CKS Airport, Taoyuan, Taiwan October 31, 2000", ''Aviation Safety Council, Taiwan, Republic of China''</ref> The cause was attributed to the flight crew navigating to the wrong runway.<ref name="ASCReport"/>
-The 747-400F has recorded five hull-loss accidents. On September 3, 2010, [[UPS Airlines Flight 6]] from [[Dubai International Airport]] to [[Cologne Bonn Airport]] crashed approximately 25 minutes after takeoff. The crew of the Boeing 747-400F declared an emergency due to an in-flight fire and attempted to return to Dubai. However, the fire had damaged the flight controls and the oxygen supply, causing the first officer to lose control of the aircraft and the captain to lose consciousness. The aircraft crashed into the ground at high speed during the second landing attempt, killing both crew members. Subsequent investigations determined that the fire had originated from [[Lithium-ion battery|lithium-ion batteries]] in the cargo hold.<ref>[https://archive.today/20120716181309/http://today.msnbc.msn.com/id/38992716/from/toolbar UPS names 2 who died in Dubai crash – TODAY News – TODAYshow.com<!-- Bot generated title -->]</ref><ref name=ASN030910>{{cite web |url=http://aviation-safety.net/database/record.php?id=20100903-0 |title=N571UP Accident description |publisher=Aviation Safety Network |access-date=September 3, 2010 |archive-date=January 14, 2012 |archive-url=https://web.archive.org/web/20120114042629/http://aviation-safety.net/database/record.php?id=20100903-0 |url-status=live }}</ref> On July 28, 2011, [[Asiana Airlines Flight 991]], a Boeing 747-400F flying from [[Incheon Airport]] to [[Shanghai Pudong Airport]], crashed into the Pacific Ocean off Jeju Island, [[South Korea]], after reportedly suffering mechanical problems due to a possible on-board fire. Two crew members on board were killed.<ref>{{cite web |url=http://english.yonhapnews.co.kr/national/2011/07/28/91/0302000000AEN20110728000700320F.HTML |title=Asiana Airlines cargo plane crashes off Jeju |language=ko |publisher=Yonhap News |date=July 28, 2011 |access-date=September 9, 2011 |archive-date=January 12, 2012 |archive-url=https://web.archive.org/web/20120112060246/http://english.yonhapnews.co.kr/national/2011/07/28/91/0302000000AEN20110728000700320F.HTML |url-status=live }}</ref> [[National Airlines Flight 102]], a 747-400BCF crashed on April 29, 2013 (the 25th anniversary of the type's first flight) at Bagram Air Base Afghanistan killing 7 crew members. The crash was attributed to a cargo shift of military vehicles to the back of the hold during take-off.<ref>{{cite web|url=http://www.carscoops.com/2013/04/dash-cam-captures-shocking-boeing-747.html|title=Dash-Cam Captures Shocking Boeing 747 Crash in Afghanistan [Graphic] - Carscoops|date=April 30, 2013|access-date=April 30, 2013|archive-date=May 2, 2013|archive-url=https://web.archive.org/web/20130502043215/http://www.carscoops.com/2013/04/dash-cam-captures-shocking-boeing-747.html|url-status=live}}</ref> On January 16, 2017, [[Turkish Airlines Flight 6491]], a 747-400F operated by [[ACT Airlines]], failed to reach the runway on landing in thick fog at [[Manas International Airport]] in [[Bishkek]], [[Kyrgyzstan]], crashed into a residential area, and caught fire. 39 people died, including all four crew members, and 35 people on the ground.<ref name="CNN - 16-01-17">{{cite web |last1= Berlinger |first1= Joshua |last2= Ostrower |first2= Jon |title= Kyrgyzstan plane crash: Dozens killed when 747 hits village |url= http://www.cnn.com/2017/01/15/asia/kyrgyzstan-plane-crash/ |work= CNN |date= 16 January 2017 |access-date= January 16, 2017 |archive-date= January 16, 2017 |archive-url= https://web.archive.org/web/20170116090121/http://www.cnn.com/2017/01/15/asia/kyrgyzstan-plane-crash/ |url-status= live }}</ref> On November 7, 2018, [[Sky Lease Cargo Flight 4854]], a 747-400F overrun the runway on landing at [[Halifax Stanfield International Airport]] in [[Nova Scotia]], [[Canada]], and broken into two pieces, causing 3 of 4 people onboard injured with no fatalities.<ref>{{Cite web |title=CityNews |url=https://toronto.citynews.ca/2018/11/07/cargo-plane-overshoots-halifax-runway-sending-four-crew-to-hospital/ |access-date=2024-04-16 |website=toronto.citynews.ca}}</ref>
+The 747-400F has recorded five hull-loss accidents. On September 3, 2010, [[UPS Airlines Flight 6]] from [[Dubai International Airport]] to [[Cologne Bonn Airport]] crashed approximately 25 minutes after takeoff. The crew of the Boeing 747-400F declared an emergency due to an in-flight fire and attempted to return to Dubai. However, the fire had damaged the flight controls and the oxygen supply, causing the first officer to lose control of the aircraft and the captain to lose consciousness. The aircraft crashed into the ground at high speed during the second landing attempt, killing both crew members. Subsequent investigations determined that the fire had originated from [[Lithium-ion battery|lithium-ion batteries]] in the cargo hold.<ref>[https://archive.today/20120716181309/http://today.msnbc.msn.com/id/38992716/from/toolbar UPS names 2 who died in Dubai crash – TODAY News – TODAYshow.com<!-- Bot generated title -->]</ref><ref name=ASN030910>{{cite web |url=http://aviation-safety.net/database/record.php?id=20100903-0 |title=N571UP Accident description |publisher=Aviation Safety Network |access-date=September 3, 2010 |archive-date=January 14, 2012 |archive-url=https://web.archive.org/web/20120114042629/http://aviation-safety.net/database/record.php?id=20100903-0 |url-status=live }}</ref> On July 28, 2011, [[Asiana Airlines Flight 991]], a Boeing 747-400F flying from [[Incheon Airport]] to [[Shanghai Pudong Airport]], crashed into the Pacific Ocean off Jeju Island, [[South Korea]], after reportedly suffering mechanical problems due to a possible on-board fire. Two crew members on board were killed.<ref>{{cite web |url=http://english.yonhapnews.co.kr/national/2011/07/28/91/0302000000AEN20110728000700320F.HTML |title=Asiana Airlines cargo plane crashes off Jeju |language=ko |publisher=Yonhap News |date=July 28, 2011 |access-date=September 9, 2011 |archive-date=January 12, 2012 |archive-url=https://web.archive.org/web/20120112060246/http://english.yonhapnews.co.kr/national/2011/07/28/91/0302000000AEN20110728000700320F.HTML |url-status=live }}</ref> [[National Airlines Flight 102]], a 747-400BCF crashed on April 29, 2013 (the 25th anniversary of the type's first flight) at Bagram Air Base Afghanistan killing 7 crew members. The crash was attributed to a cargo shift of military vehicles to the back of the hold during take-off.<ref>{{cite web|url=http://www.carscoops.com/2013/04/dash-cam-captures-shocking-boeing-747.html|title=Dash-Cam Captures Shocking Boeing 747 Crash in Afghanistan [Graphic] - Carscoops|date=April 30, 2013|access-date=April 30, 2013|archive-date=May 2, 2013|archive-url=https://web.archive.org/web/20130502043215/http://www.carscoops.com/2013/04/dash-cam-captures-shocking-boeing-747.html|url-status=live}}</ref> On January 16, 2017, [[Turkish Airlines Flight 6491]], a 747-400F operated by [[ACT Airlines]], failed to reach the runway on landing in thick fog at [[Manas International Airport]] in [[Bishkek]], [[Kyrgyzstan]], crashed into a residential area, and caught fire. 39 people died, including all four crew members, and 35 people on the ground.<ref name="CNN - 16-01-17">{{cite web |last1= Berlinger |first1= Joshua |last2= Ostrower |first2= Jon |title= Kyrgyzstan plane crash: Dozens killed when 747 hits village |url= http://www.cnn.com/2017/01/15/asia/kyrgyzstan-plane-crash/ |work= CNN |date= 16 January 2017 |access-date= January 16, 2017 |archive-date= January 16, 2017 |archive-url= https://web.archive.org/web/20170116090121/http://www.cnn.com/2017/01/15/asia/kyrgyzstan-plane-crash/ |url-status= live }}</ref> On November 7, 2018, [[Sky Lease Cargo Flight 4854]], a 747-400F overrun the runway on landing at [[Halifax Stanfield International Airport]] in [[Nova Scotia]], [[Canada]], and broken into two pieces, causing 3 of 4 people onboard injured with no fatalities.<ref>{{Cite web |title=CityNews |url=https://toronto.citynews.ca/2018/11/07/cargo-plane-overshoots-halifax-runway-sending-four-crew-to-hospital/ |access-date=2024-04-16 |website=toronto.citynews.ca|date=November 7, 2018 }}</ref>
 Other incidents involving the 747-400 did not result in irreparable aircraft damage. On December 15, 1989, [[KLM Flight 867]], a 747-400M, en route to [[Tokyo]]'s [[Narita International Airport]] from [[Amsterdam]]'s [[Schiphol International Airport]] via [[Anchorage International Airport]], flew through a thick cloud of volcanic ash, causing severe damage to the aircraft and replacement of all four engines.<ref>[[KLM Flight 867]]</ref> On July 23, 1999, a man killed the pilot of [[All Nippon Airways Flight 61]], a 747-400D bound for [[New Chitose Airport]] near [[Sapporo]], [[Hokkaidō]] from [[Haneda Airport|Tokyo International Airport]] (Haneda), during an attempted hijacking, and was restrained by other crew members; the aircraft landed safely.<ref name="BBCJapanesekillspilot">"[http://news.bbc.co.uk/1/hi/world/asia-pacific/401680.stm World: Asia-Pacific Japanese hijacker kills pilot"] {{Webarchive|url=https://web.archive.org/web/20060223055057/http://news.bbc.co.uk/1/hi/world/asia-pacific/401680.stm |date=February 23, 2006 }}. ''[[BBC]]''</ref> On September 23, 1999, [[Qantas Flight 1]], flying from Sydney to London via [[Bangkok]], overran the runway after touching down more than {{convert|1000|m|ft}} from the threshold during a storm with heavy rain, resulting in aircraft damage and minor passenger injuries.<ref name="ATSBIncidentReport">[http://www.atsb.gov.au/publications/investigation_reports/1999/AAIR/aair199904538.aspx ATSB Final Report Qantas Flight 1] {{Webarchive|url=https://web.archive.org/web/20110623083529/http://atsb.gov.au/publications/investigation_reports/1999/AAIR/aair199904538.aspx |date=June 23, 2011 }}. [[Australian Transport Safety Bureau|ATSB]], April 26, 2001.</ref> On January 31, 2001, the pilot of [[2001 Japan Airlines mid-air incident|Japan Airlines Flight 907]], a 747-400D bound for [[Naha International Airport]] from [[Haneda Airport|Tokyo Haneda Airport]], made an emergency dive to avoid a collision with a Japan Airlines DC-10-40 due to conflicting instructions from air traffic control; several people on the 747-400 suffered injuries during the evasive manoeuvres and some interior damage was sustained to the aircraft.<ref name="Asasi">"[http://www.asasi.org/papers/2005/Hiroaki%20Tomita%20-%20near%20collision%20in%20Japan.pdf Accident Investigation to a Near Mid-Air Collision] {{Webarchive|url=https://web.archive.org/web/20151210220627/http://www.asasi.org/papers/2005/Hiroaki%20Tomita%20-%20near%20collision%20in%20Japan.pdf |date=December 10, 2015 }}". asasi.org</ref>
-On October 9, 2002, [[Northwest Airlines Flight 85]], traveling from [[Detroit Metropolitan Wayne County Airport]] to [[Narita International Airport]], made an emergency landing at [[Anchorage International Airport]] after a sudden lower rudder hardover.<ref name=NTSBEvent /> On July 25, 2008, [[Qantas Flight 30]], traveling to [[Melbourne Airport]] from [[Hong Kong International Airport]], made an emergency landing at [[Ninoy Aquino International Airport]] with a gaping hole in its lower forward fuselage; no one was hurt, and authorities determined that an exploding emergency oxygen supply bottle was the most likely cause.<ref>{{cite news|url=https://www.nytimes.com/2008/07/28/world/asia/28qantas.html|title=Officials Ask Qantas to Inspect Oxygen Canisters|first=Tim|last=Johnston|newspaper=The New York Times|date=July 28, 2008|access-date=February 21, 2017|archive-date=August 19, 2017|archive-url=https://web.archive.org/web/20170819234601/http://www.nytimes.com/2008/07/28/world/asia/28qantas.html|url-status=live}}</ref><ref>Wall, Robert. [http://www.aviationweek.com/aw/generic/story.jsp?id=news/Q74707258.xml&headline=Qantas%20747%20Lands%20After%20Fuselage%20Part%20Detaches&channel=comm "Qantas 747 Lands After Fuselage Part Detaches"]{{dead link|date=March 2018 |bot=InternetArchiveBot |fix-attempted=yes }}, Aviation Week, July 25, 2008.</ref><ref>{{cite web|url=http://www.atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-053.aspx|title=Investigation: AO-2008-053 - Oxygen cylinder failure and depressurisation - Boeing 747-438, VH-OJK, 475 km north-west of Manila, Philippines, 25 July 2008|first=Australian Transport Safety|last=Bureau|access-date=September 12, 2009|archive-date=September 16, 2009|archive-url=https://web.archive.org/web/20090916081032/http://atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-053.aspx|url-status=live}}</ref>
+On October 9, 2002, [[Northwest Airlines Flight 85]], a Boeing 747-400 aircraft registered as [[N661US]] traveling from [[Detroit Metropolitan Wayne County Airport]] to [[Narita International Airport]], made an emergency landing at [[Anchorage International Airport]] after a sudden lower rudder hardover.<ref name=NTSBEvent /> On July 25, 2008, [[Qantas Flight 30]], traveling to [[Melbourne Airport]] from [[Hong Kong International Airport]], made an emergency landing at [[Ninoy Aquino International Airport]] with a gaping hole in its lower forward fuselage; no one was hurt, and authorities determined that an exploding emergency oxygen supply bottle was the most likely cause.<ref>{{cite news|url=https://www.nytimes.com/2008/07/28/world/asia/28qantas.html|title=Officials Ask Qantas to Inspect Oxygen Canisters|first=Tim|last=Johnston|newspaper=The New York Times|date=July 28, 2008|access-date=February 21, 2017|archive-date=August 19, 2017|archive-url=https://web.archive.org/web/20170819234601/http://www.nytimes.com/2008/07/28/world/asia/28qantas.html|url-status=live}}</ref><ref>Wall, Robert. [http://www.aviationweek.com/aw/generic/story.jsp?id=news/Q74707258.xml&headline=Qantas%20747%20Lands%20After%20Fuselage%20Part%20Detaches&channel=comm "Qantas 747 Lands After Fuselage Part Detaches"]{{dead link|date=March 2018 |bot=InternetArchiveBot |fix-attempted=yes }}, Aviation Week, July 25, 2008.</ref><ref>{{cite web|url=http://www.atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-053.aspx|title=Investigation: AO-2008-053 - Oxygen cylinder failure and depressurisation - Boeing 747-438, VH-OJK, 475 km north-west of Manila, Philippines, 25 July 2008|first=Australian Transport Safety|last=Bureau|access-date=September 12, 2009|archive-date=September 16, 2009|archive-url=https://web.archive.org/web/20090916081032/http://atsb.gov.au/publications/investigation_reports/2008/aair/ao-2008-053.aspx|url-status=live}}</ref>
-Some incidents however, led to irreparable damage and those airframes were written off. On September 4, 2009, [[Air India]] Flight 829, a 747-437 (registered VT-ESM), suffered an engine fire at [[Chhatrapati Shivaji Maharaj International Airport|Mumbai]], shortly before take-off. None of the 213 passengers and 16 crew was injured or killed, but the severe fire damage caused the aircraft to be written off and it was scrapped in May 2011.<ref>{{cite web|url=https://aviation-safety.net/database/record.php?id=20090904-0 |title=ASN Aircraft accident Boeing 747-437 VT-ESM Mumbai-Chhatrapati Shivaji Maharaj International Airport (BOM)|publisher=Aviation-safety.net |date= |accessdate=January 25, 2020}}</ref> On 17 June 2015, [[Delta Air Lines]] Flight 159, a Boeing 747-451 (registered N664US), flying from [[Detroit Metropolitan Airport|Detroit]] to [[Incheon International Airport|Seoul-Incheon]], suffered substantial damage to the interiors, the nose cone, engines and wing slats, after flying through a severe hailstorm above China. The 26 year old 747 was ferried from Seoul to Marana, Arizona for storage.<ref>{{Cite web|url= https://aviation-safety.net/database/record.php?id=20150617-0|title= Delta Flight 159 - Aviation Safety Network}}</ref>
+Some incidents however, led to irreparable damage and those airframes were written off. On September 4, 2009, [[Air India]] Flight 829, a 747-437 (registered VT-ESM), suffered an engine fire at [[Chhatrapati Shivaji Maharaj International Airport|Mumbai]], shortly before take-off. None of the 213 passengers and 16 crew was injured or killed, but the severe fire damage caused the aircraft to be written off and it was scrapped in May 2011.<ref>{{cite web|url=https://aviation-safety.net/database/record.php?id=20090904-0 |title=ASN Aircraft accident Boeing 747-437 VT-ESM Mumbai-Chhatrapati Shivaji Maharaj International Airport (BOM)|publisher=Aviation-safety.net |date= |accessdate=January 25, 2020}}</ref> On 17 June 2015, [[Delta Air Lines]] Flight 159, a Boeing 747-451 (registered N664US), flying from [[Detroit Metropolitan Airport|Detroit]] to [[Incheon International Airport|Seoul-Incheon]], suffered substantial damage to the interiors, the nose cone, engines and wing slats, after flying through a severe hailstorm above China. The 26 year old 747 was ferried from Seoul to Marana, Arizona for storage. In 2021, a [[Longtail Aviation Flight 5504|Boeing 747 freighter's engine caught fire]] and multiple parts detached, causing 2 people to be injured on the ground. The aircraft landed safely and was returned to service.<ref>{{Cite web|url= https://aviation-safety.net/database/record.php?id=20150617-0|title= Delta Flight 159 - Aviation Safety Network}}</ref>
 <!-- Only accidents or notable incidents. See [[WP:WikiProject Aircraft/page content#Incidents]] for project guidelines for inclusion. -->
 ==Aircraft on display==
 [[File:Delta people celebrate opening of '747' exhibit (33682622646).jpg|thumb|N661US, the first 747-400 built, preserved at the '747 Experience' exhibit, [[Delta Flight Museum]]]]
-Following the gradual withdrawal of older examples of the type from passenger service from the early-2010's onward, a relatively large number of Boeing 747-400s have entered preservation after being decommissioned.
+Following the gradual withdrawal of older examples of the type from passenger service from the early-2010s onward, a relatively large number of Boeing 747-400s have entered preservation after being decommissioned.
 * An ex-Qantas 747-400 formerly registered VH-OJA and [[City of Canberra (aircraft)|named ''City of Canberra'']], the first 747-400 delivered to the airline, is displayed at the Historical Aviation Restoration Society museum at [[Illawarra Regional Airport]] south of [[Wollongong]], New South Wales, Australia. It is the first {{not a typo|747-400}} to be preserved, and also holds the record for the longest non-stop flight undertaken by a commercial aircraft, from London To Sydney in 20 hours, 9 minutes and 5 seconds, a record it has held since 1989.<ref>{{Cite web |url=http://hars.org.au/boeing-747-438-longreach/ |title=Boeing 747-438 Longreach City of Canberra HARS |access-date=November 30, 2015 |archive-date=December 8, 2015 |archive-url=https://web.archive.org/web/20151208061544/http://hars.org.au/boeing-747-438-longreach/ |url-status=live }}</ref>
 *[[N661US]], a former [[Delta Air Lines]] example, is on display at the [[Delta Flight Museum]] at [[Hartsfield-Jackson Atlanta International Airport]] in Atlanta, Georgia.<ref name=DeltaMuseum /><ref>{{cite web|url=http://www.cnn.com/2016/05/02/aviation/first-historic-boeing-747-400-airliner-moved-to-delta-museum/index.html|title=Why did the historic 747 cross the road?|website=[[CNN]] |date=May 2, 2016|access-date=May 3, 2016|archive-date=May 4, 2016|archive-url=https://web.archive.org/web/20160504174207/http://www.cnn.com/2016/05/02/aviation/first-historic-boeing-747-400-airliner-moved-to-delta-museum/index.html|url-status=live}}</ref> The aircraft was the first -400 series built, serving as the prototype (then registered N401PW) prior to delivery to [[Northwest Airlines]] in December 1989. It is also the aircraft that was involved in [[Northwest Airlines Flight 85]].<ref name=DeltaMuseum /><ref name=NTSBEvent />
@@ Line 438: / Line 439: @@
 **G-BYGA, one of British Airways last 747-400's used for flying, was retired on 8 September 2020.<ref>{{Cite press release |title=British Airways 747 retirements |url=https://mediacentre.britishairways.com/pressrelease/details/12468 |access-date=2024-02-09 |publisher=British Airways|location=UK}}</ref> The cockpit and partial upper deck  was converted into an event space and flight simulator at the Barton City Airport known as 'The Deck' in August 2022.{{citation needed|date=March 2024}}
 *HS-STA, A former [[Orient Thai Airlines|Orient Thai]] Boeing 747-400 was converted into a cafe and restaurant in Bangkok's Lat Krabang district.<ref>{{Cite web|last=coconutsbangkok|date=2021-03-05|title=Retired Boeing 747 gets second life as a Bangkok cafe {{!}} Coconuts Bangkok|url=https://coconuts.co/bangkok/food-drink/retired-boeing-747-gets-second-life-as-a-bangkok-cafe/|access-date=2021-06-13|website=Coconuts|language=en-US}}</ref> The airplane originally belonged to [[United Airlines]], registered N187UA.<ref>{{Cite web|title=Orient Thai Airlines HS-STA (Boeing 747 - MSN 26876) (Ex N187UA ) {{!}} Airfleets aviation|url=https://www.airfleets.net/ficheapp/plane-b747-26876.htm|access-date=2021-06-13|website=www.airfleets.net}}</ref>
-*HS-STB, A former [[Orient Thai Airlines|Orient Thai]] Boeing 747-400 has a fuselage without wing preserved at Flight of Happiness restaurant in [[Guanyin District]], [[Taoyuan, Taiwan|Taoyuan]], Taiwan <ref>{{Cite web |title=HS-STB ORIENT THAI AIRLINES BOEING 747-441|url=https://www.planespotters.net/airframe/boeing-747-400-hs-stb-orient-thai-airlines/elnn53|access-date=2023-01-11 |website=www.planespotters.net|date=September 29, 2021 }}</ref>
+*HS-STB, A former [[Orient Thai Airlines|Orient Thai]] Boeing 747-400 has a fuselage without wing preserved at Flight of Happiness restaurant in [[Guanyin District]], [[Taoyuan, Taiwan|Taoyuan]], Taiwan.{{Cn|date=September 2024}}
 *HS-TGR Siriwatthana, A former [[Thai Airways]] 747-400 was purchased by a Thai businessman named Somchai Phukieow in July 2018 and had it shipped to his home in [[Chai Nat Province]], Thailand<ref>{{cite web |last1=Schneider |first1=Kate |title=Baffled locals find abandoned 747 plane |url=https://www.news.com.au/travel/travel-ideas/weird-and-wacky/baffled-locals-find-abandoned-747-plane/news-story/68a382decf0ecf791987d81b7bba4b8d |website=News.com.au |date=July 10, 2018 |access-date=12 December 2018 |archive-date=December 12, 2018 |archive-url=https://web.archive.org/web/20181212055741/https://www.news.com.au/travel/travel-ideas/weird-and-wacky/baffled-locals-find-abandoned-747-plane/news-story/68a382decf0ecf791987d81b7bba4b8d |url-status=live }}</ref> The aircraft had its engines removed and the titles painted over, but is otherwise unchanged from its time in active service.
-*HS-TGT Watthanothai, A former [[Thai Airways]] 747-400, has been placed on static display at Chic Chic Market in [[Nong Khai]], Thailand, alongside ex-[[Las Vegas Sands]] [[Lockheed L-1011 TriStar]] N388LS.<ref>{{Cite web |title=HS-TGT Thai Airways International Boeing 747-400 |url=https://www.planespotters.net/airframe/boeing-747-400-hs-tgt-thai-airways-international/3vn0de |access-date=2022-06-13 |website=www.planespotters.net}}</ref>
+*HS-TGT Watthanothai, A former [[Thai Airways]] 747-400, has been placed on static display at Chic Chic Market in [[Nong Khai]], Thailand, alongside ex-[[Las Vegas Sands]] [[Lockheed L-1011 TriStar]] N388LS.{{Cn|date=September 2024}}
 ==Specifications==
@@ Line 554: / Line 555: @@
 ==External links==
-{{Commons category inline|Boeing 747-400}}
+{{Commons category-inline|Boeing 747-400}}
 * [http://www.boeing.com/commercial/747family/back/index.html 747-400 page on Boeing.com]
 * [http://www.airliners.net/aircraft-data/stats.main?id=100 747-400 page on Airliners.net]

v t e Boeing 747 family
Base models	747-100 747SP 747-200 747-300 747-400 747-8
Government & military	E-4 Shuttle Carrier Aircraft SOFIA VC-25 (Air Force One) YAL-1
Notable aircraft	747 Supertanker Boeing Dreamlifter City of Canberra Jumbo Stay N661US N7470 N747PA N747GE Spirit of Mojave
Topics	Hull losses In fiction Operators
Other	747 (performance art) Jumbo: The Plane that Changed the World

v t e Boeing aircraft model numbers
Aircraft	1 2 3 4 5 6 6D/E 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 220 221 222 223 224 225 226 227 228 229 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 276 277 278 279 280 281 282 283 284 285 286 287 288 290 291 292 293 294 295 296 297 298 299 300 302 303 304 305 306 307 308 309 311 312 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 345-2/4/31 346 348 349 350 351 352 353 354 355 356 357 358 359 361 362 363 364 365 366 367 -76 367-80 368 369 370 371 372 373 374 375 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 431 432 433 434 435 436 437 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 479 480 481 482 483 484 485 486 490 493 495 497 498 701 733 739 814 815 818 820 831 844 853-21 953 1041 1044 1046 1074 1080 2000 2020 707 -020 717 (I) -100/146/148/166 717 (II) 720 727 737 -253 Classic Next Generation -700W -800A MAX 747 SP -2G4B -400 -4G4F -8 757 -2G4 767 777 X 787 2707
Turbine engines	8C 500 502 520 550
Missiles	600 601 602 621 624 631 641
Vessels	929
Other	Boeing Customer Codes

v t e United States military transport aircraft designations, Army/Air Force and Tri-Service systems
Army/Air Force sequence (1925–1962)	C-1 C-2 C-3 C-4 C-5 C-6 C-7 C-8 C-9 C-10 C-11 C-12 C-13¹ C-14 C-15 C-16 C-17 C-18 C-19 C-20 C-21 C-22 C-23 C-24 C-25 C-26 C-27 C-28 C-29 C-30 C-31 C-32 C-33 C-34 C-35 C-36 C-37 C-38 C-39 C-40 C-41 C-41A C-42 C-43 C-44 C-45 C-46 C-47 C-47F C-47T AC-47 C-48 C-49 C-50 C-51 C-52 C-53 C-54 C-55 C-56 C-57 C-58 C-59 C-60 C-61 C-62 C-63 C-64 C-65 C-66 C-67 C-68 C-69 C-70 C-70B C-71 C-72 C-73 C-74 C-75 C-76 C-77 C-77B–D C-78 C-79 C-80 C-81 C-82 C-83 C-83A C-83B C-84 C-85 C-86 C-87 C-88 C-89 C-90 C-91 C-92 C-93 C-94 C-95 C-96 C-97 KC-97 C-98 C-99 C-100 C-101 C-102 C-103 C-104 C-105 C-106 C-107 C-108 C-109 C-110 C-111 C-112 C-113 C-114 C-115 C-116 C-117 C-117D C-118 C-119 AC-119 C-120 C-121 C-121F EC-121 C-122 C-123 C-123A C-124 C-125 C-126 C-127² C-127 (I) C-127 (II) C-128 C-129 C-130 C-130J AC-130 DC-130 EC-130/H HC-130 KC-130 LC-130 MC-130 WC-130 C-131 NC-131H C-132 C-133 C-134 C-135 KC-135 C-136 C-137² YC-137 (I) YC-137 (II) C-137 C-138¹ C-139¹ C-140 C-141 C-142
Tri-service sequence (1962–present)	C-1 C-2 C-3 C-4 C-5 C-6 C-7² C-7 RC-7 C-8 C-9 C-10² C-10 KC-10 C-11 C-12 RC-12 C-13¹ C-14 C-15 C-16¹ C-17 C-18 C-19 C-20² C-20A–D C-20F–J C-21 C-22 C-23 C-24 C-25 C-26 C-27 C-27J C-28 C-29 C-30¹ C-31 C-32 C-33 C-34¹ C-35 C-36³ C-37 C-37B C-38 C-39¹ C-40 C-41 C-42¹ C-43¹ C-44¹ C-45 C-46
Revived original sequence (2005–present)	C-143 C-144 C-145 C-146 C-147
Non-sequential designations	C-767 C-767B C-880
Related designations	CT-39 CT-43 CV-2 CV-7
¹ Not assigned • ² Assigned to multiple types • ³ Unconfirmed