Primary finding
Probable cause
A pilot induced low rotor rpm condition, followed by blade flapping as the main rotor blade contacted the tail of the helicopter.
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NTSB investigation record
NYC89DNE01
CompletedBell 47D1· N163B
- Date
- December 2, 1988
- Location
- Russell, MA
- Conditions
- Not recorded
- Record
- Completed
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