NTSB Identification: SEA95LA063.
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Accident occurred Tuesday, March 07, 1995 in BONNERS FERRY, ID
Probable Cause Approval Date: 09/24/1995
Aircraft: HILLER UH-12C, registration: N222TE
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 PILOT REPORTED THAT DURING A STUDENT SOLO INSTRUCTIONAL FLIGHT, HE PERFORMED AN APPROACH TO A PINNACLE AND HELD A HOVER APPROXIMATELY THREE FEET ABOVE THE GROUND. THE PILOT THEN TRANSITIONED TO FORWARD FLIGHT AND STATED THAT THE ROTOR RPM BEGAN TO DECREASE. SUITABLE TERRAIN WAS NOT AVAILABLE, THEREFORE THE PILOT INITIATED A RIGHT 180 DEGREE TURN. DURING THE TURN, THE ROTOR RPM CONTINUED TO DECAY UNTIL TAIL ROTOR AUTHORITY WAS LOST. THE PILOT THEN SIDE SLIPPED THE HELICOPTER TO THE RIVER BANK, WHERE THE HELICOPTER LANDED HARD AND ROLLED ONTO ITS RIGHT SIDE. THE PILOT REPORTED THAT THERE WERE NO MECHANICAL FAILURES OR MALFUNCTIONS WITH THE HELICOPTER AT THE TIME OF THE ACCIDENT.

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

ROTOR RPM WAS NOT MAINTAINED. FACTORS TO THE ACCIDENT WERE: INADEQUATE IN FLIGHT PLANNING/DECISION AND SUITABLE TERRAIN WAS NOT AVAILABLE.

Full narrative available

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