ASN Aircraft accident Boeing 747-237B VT-EBO Delhi-Palam Airport (DEL)
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Status:Accident investigation report completed and information captured
Date:Tuesday 29 August 1978
Time:06:42
Type:Silhouette image of generic B742 model; specific model in this crash may look slightly different
Boeing 747-237B
Operator:Air-India
Registration: VT-EBO
MSN: 20558/188
First flight: 1972-04-14 (6 years 5 months)
Engines: 4 Pratt & Whitney JT9D-7J
Crew:Fatalities: 0 / Occupants: 21
Passengers:Fatalities: 0 / Occupants: 356
Total:Fatalities: 0 / Occupants: 377
Aircraft damage: Substantial
Aircraft fate: Repaired
Location:Delhi-Palam Airport (DEL) (   India)
Phase: Takeoff (TOF)
Nature:International Scheduled Passenger
Departure airport:Delhi-Palam Airport (DEL/VIDP), India
Destination airport:Frankfurt International Airport (FRA/EDDF), Germany
Flightnumber:AI123
Narrative:
The Boeing 747 was cleared for take-off from Delhi Airport on Runway 28 on its scheduled flight 123 from Delhi to Frankfurt.
During the take-off roll at approximately 150 knots, a thud sound was heard and take-off was aborted.
Four thrust reversers, wheel brakes and speed brakes were deployed. No 3 and No 4 thrust reversers were ineffective and the aircraft veered to left of runway and entered soft ground resulting in left-hand wing landing gear collapse and substantial damage.

Probable Cause:

The accident is attributed to failure on the part of the crew to stop the aircraft within the available runway length during an aborted take-off following failure of No 3 engine, due to the crew's reaction time in executing aborted take-off procedure being in excess of that allowed for in the scheduled performance criteria. No 3 engine failed during the take-off roll following ingestion of retreaded tyre pieces from the right-hand wing landing gear inboard front wheel.

Classification:
Rejected takeoff
Runway excursion

Sources:
» Civil aircraft accidents 1978 / Ministry of Tourism and Civil Aviation, CAD, ASD


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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 Delhi-Palam Airport to Frankfurt International Airport as the crow flies is 6084 km (3803 miles).

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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