Primary finding
Probable cause
Failure of the main rotor blade appears to be the result of a static downward bending overstress, caused by another helicopter hovering over or very close to the main rotor blade as it was in a static/stopped position.
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NTSB investigation record
NYC88IA186
CompletedMbb Bk-117· N135CP
- Date
- July 12, 1988
- Location
- Manhattan, NY
- Conditions
- Not recorded
- Record
- Completed
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