Incident Overview
A pilot experienced engine roughness while flying over mountainous terrain. Below was a large snow-covered meadow, so the pilot circled the area while attempting to diagnose and resolve the engine issue. Efforts to restore full power were unsuccessful.
Decision and Landing
The airplane was equipped with large tundra tires. The pilot judged that a precautionary landing under partial power was more prudent than continuing to the nearest airport, which would require crossing mountain ridges and overflying surrounding forest. During a wheel landing on the snow, the airplane nosed over and came to rest inverted.
Damage Assessment
The forward section of the airframe, both wing spars, and the vertical stabilizer were bent. The exact reason for the partial power loss could not be determined.
Technical Details
No further information regarding the aircraft type, registration, operator, or occupant injuries was specified in the source.