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Last updated: 15 August 2020
Estado:Final
Fecha:miércoles 20 noviembre 1974
Hora:07:54
Tipo:Silhouette image of generic B741 model; specific model in this crash may look slightly different
Boeing 747-130
Operador:Lufthansa
Registración: D-ABYB
Numéro de série: 19747/29
Año de Construcción: 1970-03-30 (4 years 8 months)
Horas Totales de la Célula:16781
Motores: 4 Pratt & Whitney JT9D-7
Tripulación:Fatalidades: 4 / Ocupantes: 17
Pasajeros:Fatalidades: 55 / Ocupantes: 140
Total:Fatalidades: 59 / Ocupantes: 157
Daños en la Aeronave: Anulado
Consecuencias: Written off (damaged beyond repair)
Ubicación:Nairobi International Airport (NBO) (   Kenia)
Fase: Despegue (TOF)
Naturaleza:Vuelo Internacional Programado
Aeropuerto de Salida:Nairobi International Airport (NBO/HKNA), Kenia
Aeropuerto de Llegada:Johannesburg International Airport (JNB/FAJS), Sudáfrica
Número de Vuelo:LH540
Descripción:
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."

Fuentes:
» Flight International 28 August 1976 (481)
» ICAO Circular 132-AN/93 (181-194)


Fotos

photo of Boeing-747-130-D-ABYB
accident date: 20-11-1974
type: Boeing 747-130
registration: D-ABYB
photo of Boeing-747-130-D-ABYB
accident date: 20-11-1974
type: Boeing 747-130
registration: D-ABYB
 

Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Nairobi International Airport to Johannesburg International Airport as the crow flies is 2898 km (1812 miles).
Accident location: Exact; deduced from official accident report.

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