Incident Overview
A pilot on final approach to an airport situated on top of a mesa experienced severe downdrafts while the flaps were fully extended. The airport UNICOM had previously advised the pilot of strong winds at the location.
Pilot Actions
Upon encountering the downdrafts, the pilot immediately raised the flaps to 20 degrees, applied full power, and raised the airplane's nose to achieve the best angle of climb airspeed. Despite these actions, the airplane continued to descend.
Outcome
The airplane eventually collided with the terrain. The pilot reported that the airplane did not experience any preimpact malfunctions or failures.
Conclusion
The investigation did not assign a probable cause for the accident.