Détails:
Boeing 747 D-ABYB was taking off for the last leg of the Frankfurt (FRA) - Nairobi (NBO) - Johannesburg (JNB) flight when the crew felt vibration or buffeting following lift off. The captain, suspecting wheel imbalance, raised the gear. A lack of acceleration forced the crew to lower the nose in order to maintain airspeed. The Boeing continued to descend however and contacted the ground 1120 m past the end of runway 24 and struck an elevated road 114 m further on. The aircraft broke up and caught fire before coming to rest 454 m past the initial point of impact.
PROBABLE CAUSE: "The accident was caused by the crew initiating a take-off with the leading edge flaps retracted because the pneumatic system which operates them had not been switched on. This resulted in the aircraft becoming airborne in a partially stalled condition which the pilots did not identify in the short time available to them for recovery. Major contributory factors were the lack of warning of a critical condition of leading edge flap position and the failure of the crew to complete satisfactorily their checklist items."
» ICAO Circular 132-AN/93 (181-194)
accident date: 20-11-1974
type: Boeing 747-130
registration: D-ABYB
accident date: 20-11-1974
type: Boeing 747-130
registration: D-ABYB
| Statuts: | Accident investigation report completed and information captured |
| Date: | mercredi 20 novembre 1974 |
| Heure: | 07:54 |
| Type/Sous-type: |  Boeing 747-130 |
| Compagnie: | Lufthansa |
| Immatriculation: | D-ABYB |
| Numéro de série: | 19747/29 |
| Année de Fabrication: | 1970-03-30 (4 years 8 months) |
| Heures de vol: | 16781 |
| Moteurs: | 4 Pratt & Whitney JT9D-7 |
| Equipage: | victimes: 4 / à bord: 17 |
| Passagers: | victimes: 55 / à bord: 140 |
| Total: | victimes: 59 / à bord: 157 |
| Dégats de l'appareil: | Détruit |
| Conséquences: | Written off (damaged beyond repair) |
| Lieu de l'accident: | Nairobi International Airport (NBO) ( Kénya)
|
| Phase de vol: | Au décollage (TOF) |
| Nature: | Transport de Passagers Intern. |
| Aéroport de départ: | Nairobi International Airport (NBO/HKNA), Kénya |
| Johannesburg International Airport (JNB/FAJS), Afrique du Sud | |
| Numéro de vol: | LH540 |
Boeing 747 D-ABYB was taking off for the last leg of the Frankfurt (FRA) - Nairobi (NBO) - Johannesburg (JNB) flight when the crew felt vibration or buffeting following lift off. The captain, suspecting wheel imbalance, raised the gear. A lack of acceleration forced the crew to lower the nose in order to maintain airspeed. The Boeing continued to descend however and contacted the ground 1120 m past the end of runway 24 and struck an elevated road 114 m further on. The aircraft broke up and caught fire before coming to rest 454 m past the initial point of impact.
Probable Cause:
PROBABLE CAUSE: "The accident was caused by the crew initiating a take-off with the leading edge flaps retracted because the pneumatic system which operates them had not been switched on. This resulted in the aircraft becoming airborne in a partially stalled condition which the pilots did not identify in the short time available to them for recovery. Major contributory factors were the lack of warning of a critical condition of leading edge flap position and the failure of the crew to complete satisfactorily their checklist items."
Sources:
» Flight International 28 August 1976 (481)» ICAO Circular 132-AN/93 (181-194)
Photos
accident date: 20-11-1974
type: Boeing 747-130
registration: D-ABYB
accident date: 20-11-1974
type: Boeing 747-130
registration: D-ABYB
Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Nairobi International Airport et Johannesburg International Airport est de 2898 km (1812 miles).
Accident location: Exact; deduced from official accident report.
La distance entre Nairobi International Airport et Johannesburg International Airport est de 2898 km (1812 miles).
Accident location: Exact; deduced from official accident report.
Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
languages: 
Kénya
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