NTSB Identification: LAX97LA179.
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Accident occurred Wednesday, May 14, 1997 in TRUCKEE, CA
Probable Cause Approval Date: 04/10/1998
Aircraft: Hiller UH-12E, registration: N7082D
Injuries: 1 Serious.

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 the purpose of the accident flight was to move a 200-foot long line to a new clearing area. After takeoff from the dirt strip, the pilot heard a change in the sound of the engine. He stated that he was turning back to make an emergency landing and attempted to release the long line; however, it became entangled around a tree and the helicopter impacted the ground. FAA inspectors examined the helicopter and the long line, but could not make a determination of when the long line became entangled in the tree; during takeoff or upon returning to land. Examination of the engine revealed continuity throughout, with no preexisting malfunctions noted.

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

A loss of engine power for undetermined reasons. A factor in the accident was the unsuccessful attempt to release the long line from the belly hook after it became entangled in a tree.

Full narrative available

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