Primary finding
Probable cause
The encounter with rough, unsuitable terrain during a precautionary landing. Contributing to the accident was the pilot's decision to make an autorotation after encountering an airframe vibration.
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NTSB investigation record
LAX91LA369
CompletedHiller Uh12D· N100HH
- Date
- August 25, 1991
- Location
- Sparks, NV
- Conditions
- VMC
- Record
- Completed
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