Incident Overview
A single-aircraft accident occurred during a nighttime positioning flight over mountainous terrain. The airplane collided with the top of a 4,600-foot bluff, resulting in a wreckage path measuring 567 feet in length. The path was oriented along the direct course line from the departure point to the destination.
Pilot Information
The pilot involved had a documented history of transient global amnesia, a medical condition characterized by temporary memory loss.
Wreckage Examination
Examination of the accident site revealed that the wreckage path, spanning 567 feet, was aligned with the intended route. Damage to the engine and propeller indicated that the engine was developing power at the moment of impact.
Conclusion
The investigation did not assign a probable cause for the accident. The available facts describe a collision with terrain during a nighttime positioning flight over mountainous terrain, with the engine operating under power.