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Accident description
Last updated: 11 December 2017
Status:Final
Date:Friday 9 November 2012
Time:19:15 UTC
Type:Silhouette image of generic C46 model; specific model in this crash may look slightly different
Curtiss C-46A-45-CU Commando
Operator:Buffalo Airways
Registration: C-GTXW
C/n / msn: 30386
First flight: 1944
Engines: 2 Pratt & Whitney R-2800-51M3
Crew:Fatalities: 0 / Occupants: 3
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 0 / Occupants: 3
Airplane damage: Substantial
Airplane fate: Repaired
Location:Yellowknife Airport, NT (YZF) (   Canada)
Phase: Landing (LDG)
Nature:Unknown
Departure airport:Yellowknife Airport, NT (YZF/CYZF), Canada
Destination airport:Yellowknife Airport, NT (YZF/CYZF), Canada
Flightnumber: 509
Narrative:
The Buffalo Airways Curtiss C-46A (C-GTXW) was operating as BFL509 on a local flight at Yellowknife, NT (CYZF). BFL509 landed on runway 10 and rolled to the intersection of runway 16/34 where the left main gear collapsed. The aircraft came to rest on the left wing resulting in substantial damage. There were no injuries to the 3 crew members.
The aircraft had indicated three green and amber (normal) landing gear lights on approach. The cause of the collapse was found to be foreign object intrusion. It was found that a ball peen hammer was lodged between the inboard drag strut and folding member. It is thought that the side load, which the hammer imposed, caused the down lock to slip out before full weight of the aircraft could insert the automatic gear pin. The aircraft was hoisted, the hammer removed and the gear locked in normally.

Accident investigation:
Investigating agency: TSB Canada
Status: No formal investigation conducted
Accident number: A12W0166

Classification:

Runway excursion

Sources:
» CADORS 2012C4842


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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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