ASN Aircraft accident de Havilland DH-106 Comet 4 G-APDH Singapore-Paya Lebar Airport (QPG)
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Status:Accident investigation report completed and information captured
Date:Sunday 22 March 1964
Time:09:19 UTC
Type:Silhouette image of generic COMT model; specific model in this crash may look slightly different
de Havilland DH-106 Comet 4
Operating for:Malaysian Airways
Leased from:British Overseas Airways Corporation - BOAC
Registration: G-APDH
MSN: 6409
First flight: 1958-11-21 (5 years 4 months)
Engines: 4 Rolls-Royce Avon 524
Crew:Fatalities: 0 / Occupants: 8
Passengers:Fatalities: 0 / Occupants: 60
Total:Fatalities: 0 / Occupants: 68
Aircraft damage: Damaged beyond repair
Location:Singapore-Paya Lebar Airport (QPG) (   Singapore)
Phase: Landing (LDG)
Nature:International Scheduled Passenger
Departure airport:Kuala Lumpur International Airport (KUL/WMKK), Malaysia
Destination airport:Singapore-Paya Lebar International Airport (SIN/WSAP), Singapore
Flightnumber: 511
The flight from Kuala Lumpur was uneventful until the airplane approached Singapore. Visibility was good as the co-pilot started the approach to runway 02. The flare was initiated a little late and the airplane touched down firmly. The Comet bounced and floated a few feet over the runway. During the bounce the starboard wheel bogie and part of the landing gear leg dropped off. The crew tried to hold the wing off the ground after the aircraft settled back onto the runway. Finally the wing contacted the runway. The engines were shut down and left wheel brakes applied before the aircraft came to rest.

Probable Cause:

PROBABLE CAUSE: "The landing gear leg, which had previously been weakened by fatigue, failed on first impact during the landing."

Landing gear collapse
Runway mishap

» ICAO Aircraft Accident Digest No.16, Circular 82-AN/69 (114-123)

Follow-up / safety actions
The approved operating life of all Comet 4 undercarriage legs was reduced from 8000 to 4500 landings. The legs were later modified and the approved life was again put at 8000 landings.


photo of de-Havilland-DH-106-Comet-4-G-APDH
accident date: 22-03-1964
type: de Havilland DH-106 Comet 4
registration: G-APDH

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 Kuala Lumpur International Airport to Singapore-Paya Lebar International Airport as the crow flies is 287 km (180 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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