ASN Wikibase Occurrence # 287560
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| Date: | Friday 20 July 2012 |
| Time: | 12:45 LT |
| Type: |  Bell 206L-3 |
| Owner/operator: | Bristow Alaska Inc |
| Registration: | N363AL |
| MSN: | 51472 |
| Year of manufacture: | 1991 |
| Total airframe hrs: | 12617 hours |
| Engine model: | Rolls Royce C30P |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Circle, Alaska -
 United States of America
|
| Phase: | Standing |
| Nature: | Executive |
| Departure airport: | Mizan Teferi Airport (MTF/HAMT) |
| Circle, AK | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot elected to land the high skid, turbine-powered helicopter in a burned-out wooded area as part of a vegetation reclamation survey. The area he selected contained several rain-soaked, burned, and fallen birch trees and required that he land on the fallen trees with the helicopter's skids perpendicular to the trees. The operator reported that, after landing atop the uneven, fallen trees, the pilot retarded the engine throttle to flight idle to begin the mandatory 2 minute engine cool down procedure. The helicopter subsequently tipped backwards and slid to the left, and the tail rotor struck a log. The helicopter sustained substantial damage to the tail boom, tail rotor drive system, and tail rotor gearbox. The pilot said that there were no preimpact mechanical problems with the helicopter.
Probable Cause: The pilot's selection of unsuitable terrain for landing.
Accident investigation:
 |
|
Sources:
NTSB ANC12CA077
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 12:06 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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