NTSB Identification: SEA07LA052.
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Accident occurred Tuesday, January 23, 2007 in Beaver Marsh, OR
Probable Cause Approval Date: 05/29/2007
Aircraft: Cessna 172D, registration: N2599U
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.

According to the pilot, about 30 to 35 minutes into the flight, while in level cruise flight at 9,500 feet msl, the engine began to lose power. The pilot attempted to resolve the problem by adding and removing carburetor heat, adjusting the fuel mixture, switching tanks and selecting each magneto separately. However, the power loss continued with the RPM dropping to 1,000 by the end of the flight. The pilot set up for a forced landing in terrain he described as "level and forested with coniferous trees." He landed in a clearing in the trees, and during the landing roll, the nose wheel separated, and the airplane nosed down. Post accident examination of the engine and airframe did not reveal the reason for the loss of engine power.

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

The loss of engine power for undetermined reasons. A contributing factor was the lack of suitable terrain for the forced landing.

Full narrative available

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