Accident Summary
An instrument-rated commercial pilot and two passengers departed from a backcountry airstrip. The airplane was later observed by a ground witness maneuvering below the tops of mountain peaks in fog and rain. Subsequently, the airplane impacted mountainous terrain. No radio distress calls or requests for assistance were received from the pilot.
Flight and Witness Observations
A ground witness observed the airplane flying below the peaks of surrounding mountains in conditions of fog and rain. The airplane was in a cruise flight configuration at the time of impact. There was evidence that the engine was producing power at impact. An examination of the airplane revealed no preimpact mechanical malfunction or failure.
Weather Conditions
Weather data indicated overcast clouds, rain, and mountain obscuration in the area. No evidence was found to indicate any turbulence or wind gusts at the time of the accident.
Aircraft Examination
Postimpact examination of the airplane confirmed it was configured for cruise flight. The engine was producing power, and no mechanical issues were identified. The investigation found no evidence of a preimpact malfunction or failure of the airplane.