NTSB Identification: FTW98LA405.
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Accident occurred Saturday, September 19, 1998 in PRICE, UT
Probable Cause Approval Date: 04/06/2001
Aircraft: Bell UH-1L, registration: N5107J
Injuries: 1 Minor.

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 was moving logs off the hillside (elevation 7,860 feet, density altitude 10,775 feet), up a narrow canyon that ran approximately north and south. The wind was out of the south at 10 to 12 knots, and after he set down the logs, the helicopter started to turn to the right. He said that prior to the turning, there were no unusual noises and he did not feel any control feedback. He further stated that he realized that he had lost tail rotor directional control and he autorotated to a landing spot. Immediately prior to landing, the helicopter's landing skids impacted a beaver pond and the aircraft bounced into the air nosing over allowing the main rotor blades to hit the ground.

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

The pilot's inadvertent loss of tail rotor effectiveness. Factors were the high density altitude flight conditions, the unfavorable wind condition, and the none suitable terrain for an autorotation.

Full narrative available

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