NTSB Identification: NYC88LA020.
The docket is stored on NTSB microfiche number 37660.
Accident occurred Friday, October 30, 1987 in SPRING VALLEY, NY
Probable Cause Approval Date: 05/26/1989
Aircraft: AGUSTA 109A, registration: N109AM
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE HELICOPTER HAD BEEN REFUELED AND THE PILOT WAS ATTEMPTING TO GROUND TAXI. PRIOR TO TURNING THE AIRCRAFT AROUND TO TAXI TO A PARKING AREA THE HELICOPTER WENT INTO GROUND RESONANCE AS SOON AS THE AIRCRAFT WAS MOVED. COLLECTIVE WAS LOWERED, THE ENGINE RETARDED AND THE ROTOR BRAKES APPLIED BUT GROUND RESONANCE CONTINUED UNTIL THE MAIN ROTOR BLADES CONTACTED THE PAVEMENT.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ROTORCRAFT FLIGHT CONTROLS..IMPROPER USE OF..PILOT IN COMMAND

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