Primary finding
Probable cause
Loss of engine power due to fatigue failure of the impeller. The helicopter was substantially damaged as a result of a roll-over on uneven terrain.
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NTSB investigation record
SEA90LA025
CompletedHiller Uh-12E· N9762C
- Date
- November 29, 1989
- Location
- Raymond, WA
- Conditions
- VMC
- Record
- Completed
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