Piper PA-28RT N355LC accident near Cherry Valley, California

Probable cause

The pilot’s continued flight in an area of low ceiling and visibility, which resulted in a collision with mountainous/hilly terrain.

NTSB analysis

Witnesses near the accident site reported hearing the airplane and that it seemed to be flying at low level; the engine sounded like it was operating normally. Neither witness could see the airplane because of low clouds, which were touching the tops of the ridgelines in the hilly terrain. Visibility was about 1 mile or less in fog or heavy mist. Radar data displayed a single target in the vicinity of the accident site, which was likely the accident airplane. The target made multiple tight right and left turns, and the altitude varied between 3,900 feet and 2,500 feet mean sea level. The target subsequently began a tight right descending turn until the target dropped off radar in the vicinity of the accident site. The accident site was in the foothills of mountainous terrain and located on a ridgeline. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. It is likely that the pilot entered the clouds and while maneuvering failed to maintain sufficient altitude to clear the mountainous terrain.

Text from the NTSB. Open the NTSB docket for WPR11FA182 for the full record.