Primary finding
Probable cause
An internal engine failure due to a thermal fatigue failure of the 1st stage turbine wheel as a result of overtemperature. The high rough/uneven terrain prevented a successful autorotation.
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NTSB investigation record
ANC90FA117
CompletedBell 206L-1· N300AH
- Date
- July 14, 1990
- Location
- Farewell, AK
- Conditions
- VMC
- Record
- Completed
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