NTSB Identification: ATL96LA023.
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Accident occurred Monday, December 18, 1995 in N. MYRTLE BEACH, SC
Probable Cause Approval Date: 04/18/1996
Aircraft: HILLER 12C, registration: N234SM
Injuries: 2 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 private helicopter pilot and certified flight instructor were conducting pre-checkride flight training. While executing an autorotation to a power recovery, the tail rotor assembly collided with the ground and subsequently separated from the gearbox assembly. No mechanical problems with the helicopter were reported by the pilots.

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

The pilot's improper operation of the flight controls during a practice autorotation, and the certified flight instructor's inadequate supervision of the operation

Full narrative available

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