Primary finding
Probable cause
The pilot's failure to maintain adequate main rotor rpm prior to touchdown. Factors were: the disconnected engine to transmission drive shaft and the inadequate inspection by company maintenance personnel.
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NTSB investigation record
DEN91LA095
CompletedBell 412· N20703
- Date
- July 1, 1991
- Location
- Grand Junction, CO
- Conditions
- VMC
- Record
- Completed
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