NTSB Identification: SEA02TA022.
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Accident occurred Thursday, January 03, 2002 in Butte, MT
Probable Cause Approval Date: 04/08/2003
Aircraft: Hughes 369D, registration: N8393F
Injuries: 2 Uninjured.

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

While returning from a flight at about 600-800 feet above ground level, the engine lost power. The pilot autorotated the helicopter to a median between a highway. During the event, the tailboom was severed. Post accident inspection of the engine and subsequent engine test cell run did not find evidence of a mechanical failure or malfunction.

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

Loss of engine power for undetermined reasons.

Full narrative available

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