Primary finding
Probable cause
The fatigue fracture of the 42 degree gear box input pinion. Factors include unsuitable, mountainous/hilly terrain.
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NTSB investigation record
SEA94LA128
CompletedBell 204B· N911SW
- Date
- May 27, 1994
- Location
- Libby, MT
- Conditions
- VMC
- Record
- Completed
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