NTSB Factual Report

While climbing out of a valley in mountainous terrain, the aircraft encountered a severe downdraft while crossing over a ridge. As the aircraft began to sink, the pilot added full power, lowered the nose, and kept the wings level. The aircraft did not climb at a greater rate than the downdraft was sinking, and it eventually descended into the terrain in a wings-level position. According to the pilot, there were no problems with the aircraft's engine or flight controls.

NTSB Probable Cause

The pilot's failure to maintain clearance from the terrain during a climb. Encounter with a severe downdraft, and mountainous terrain were factors.