Lufthansa Flight 540 was a scheduled commercial flight for Lufthansa operated with a Boeing 747-130, carrying 157 people (140 passengers and 17 crew members). The flight was operating the final segment of its Frankfurt–Nairobi–Johannesburg route. On 20 November 1974 it crashed and caught fire shortly past the runway on takeoff. This was the first ever crash and third hull loss of a Boeing 747.
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- Lufthansa-Flug 540 war ein Linienflug der Lufthansa, der am 20. November 1974 von Frankfurt am Main über Nairobi nach Johannesburg führen sollte. Die eingesetzte Boeing 747-130 verunglückte kurz nach dem Start vom Flughafen Jomo Kenyatta International in Nairobi, wobei 59 von 157 Menschen an Bord ums Leben kamen.
- Lufthansa Flight 540 was a scheduled commercial flight for Lufthansa operated with a Boeing 747-130, carrying 157 people (140 passengers and 17 crew members). The flight was operating the final segment of its Frankfurt–Nairobi–Johannesburg route. On 20 November 1974 it crashed and caught fire shortly past the runway on takeoff. This was the first ever crash and third hull loss of a Boeing 747. As the aircraft was making its takeoff from runway 24 at the Jomo Kenyatta International Airport in Nairobi, the pilots felt a buffeting vibration. The captain continued the ascent and retracted the landing gear. However, as this was being done, the aircraft started to descend and the stall warning system light came on. The aircraft continued to descend and approximately 3,700 feet (1,100 m) from the end of the runway, the 747 grazed bushes and grass. It then struck an elevated access road and broke up. The left wing exploded and fire spread to the fuselage. Of the 157 people aboard, 59 perished (55 passengers and 4 crew members). Efforts by crew members saved a number of lives. Thomas C. Scott, a commercial pilot working the flight as a cabin crew member, was credited with saving the lives of a dozen passengers before the fuselage exploded by carrying the injured and escorting the dazed. The cause of the crash was determined to be a stall caused by the leading edge slats having been left in retracted position. Without slats deployed, the aircraft's stalling angle of attack was much lower, especially at a hot and high airport like Nairobi's with its airport elevation of 5,327 feet (1,624 m). The thinner air at higher altitudes generates less lift and further degrades the aircraft's ability to handle high angles of attack, as well as reducing the thrust provided by the 747's four turbofan engines. The elevation and temperature at the airport were within the capability of the 747, but only with slats extended. With slats retracted, the aircraft lacked sufficient lift and thrust to continue climbing once out of the ground effect found near the surface. The flight engineer was found to have failed to open the engine bleed air valves as required on the pre-flight checklist. This prevented bleed air from flowing to the 747's pneumatic system and kept it from deploying the slats for takeoff. The flight crew was blamed for not performing a satisfactory pre-take-off checklist, but the accident report also faulted the lack of adequate warning systems which could have alerted the crew to the problem. Two previous occurrences of this error had been reported, but in those cases the pilots had been able to recover the aircraft in time. After this third, deadly incident Boeing added systems to warn pilots if such conditions existed prior to takeoff.
- ルフトハンザドイツ航空540便墜落事故 (Lufthansa Flight 540) とは，1974年11月20日にルフトハンザドイツ航空のフランクフルト国際空港発ヨハネスブルグ国際空港行 540便、ボーイング747-100 が途中経由地のナイロビ国際空港で墜落した事故である。ボーイング 747 型機としては初の全損死亡事故となった。
- 漢莎航空540號班機，發生於1974年11月20日，一架漢莎航空的客機，在肯雅內羅畢失速墜毀，導致機上59人罹難，亦是波音747的首宗有人死亡的事故。
- Le 20 novembre 1974, le vol 540 de la Lufthansa, un Boeing 747, s'est écrasé au décollage de l'aéroport de Nairobi au Kenya. 59 des 157 personnes à bord furent tuées. L'enquête a révélé que l'équipage avait oublié de configurer correctement la pression hydraulique permettant de sortir les becs de bord d'attaque. Malgré la manette placée en position correcte, l'avion s'est élancé avec des becs non sortis ce qui a empêché le décollage de l'avion. Il s'agit du premier crash de l'histoire impliquant un Boeing 747.
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- Design flaw, flight crew error
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- Lufthansa-Flug 540 war ein Linienflug der Lufthansa, der am 20. November 1974 von Frankfurt am Main über Nairobi nach Johannesburg führen sollte. Die eingesetzte Boeing 747-130 verunglückte kurz nach dem Start vom Flughafen Jomo Kenyatta International in Nairobi, wobei 59 von 157 Menschen an Bord ums Leben kamen.
- ルフトハンザドイツ航空540便墜落事故 (Lufthansa Flight 540) とは，1974年11月20日にルフトハンザドイツ航空のフランクフルト国際空港発ヨハネスブルグ国際空港行 540便、ボーイング747-100 が途中経由地のナイロビ国際空港で墜落した事故である。ボーイング 747 型機としては初の全損死亡事故となった。
- 漢莎航空540號班機，發生於1974年11月20日，一架漢莎航空的客機，在肯雅內羅畢失速墜毀，導致機上59人罹難，亦是波音747的首宗有人死亡的事故。
- Lufthansa Flight 540 was a scheduled commercial flight for Lufthansa operated with a Boeing 747-130, carrying 157 people (140 passengers and 17 crew members). The flight was operating the final segment of its Frankfurt–Nairobi–Johannesburg route. On 20 November 1974 it crashed and caught fire shortly past the runway on takeoff. This was the first ever crash and third hull loss of a Boeing 747.
- Le 20 novembre 1974, le vol 540 de la Lufthansa, un Boeing 747, s'est écrasé au décollage de l'aéroport de Nairobi au Kenya. 59 des 157 personnes à bord furent tuées. L'enquête a révélé que l'équipage avait oublié de configurer correctement la pression hydraulique permettant de sortir les becs de bord d'attaque. Malgré la manette placée en position correcte, l'avion s'est élancé avec des becs non sortis ce qui a empêché le décollage de l'avion.
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- Lufthansa-Flug 540
- Lufthansa Flight 540
- Vol 540 Lufthansa
- ルフトハンザドイツ航空540便墜落事故
- 漢莎航空540號班機空難
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