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Last updated: 15 August 2020
Status:Definitief
Datum:woensdag 20 november 1974
Tijd:07:54
Type:Silhouette image of generic B741 model; specific model in this crash may look slightly different
Boeing 747-130
Luchtvaartmaatschappij:Lufthansa
Registratie: D-ABYB
Constructienummer: 19747/29
Bouwjaar: 1970-03-30 (4 years 8 months)
Aantal vlieguren:16781
Motoren: 4 Pratt & Whitney JT9D-7
Bemanning:slachtoffers: 4 / inzittenden: 17
Passagiers:slachtoffers: 55 / inzittenden: 140
Totaal:slachtoffers: 59 / inzittenden: 157
Schade: Afgeschreven
Gevolgen: Written off (damaged beyond repair)
Plaats:Nairobi International Airport (NBO) (   Kenia)
Fase: Start (TOF)
Soort vlucht:Internationale lijnvlucht
Vliegveld van vertrek:Nairobi International Airport (NBO/HKNA), Kenia
Vliegveld van aankomst:Johannesburg International Airport (JNB/FAJS), Zuid-Afrika
Vluchtnummer:LH540
Beschrijving:
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."

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


Foto's

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
 

Kaart
Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Nairobi International Airport en Johannesburg International Airport bedraagt 2898 km (1812 miles).
Accident location: Exact; deduced from official accident report.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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