Primary finding
Probable cause
Fatigue failure of the rotor transmission drive system, resulting from the improper certification/approval of the aircraft modification by the federal aviation administration.
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NTSB investigation record
SEA93LA105
CompletedKaman Hh-43F· N846D
- Date
- May 12, 1993
- Location
- Anatone, WA
- Conditions
- VMC
- Record
- Completed
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