What happened
The accident occurred between 0700 and 0830 hours in a mountain pass area situated between two valleys. The flight departed from an unknown point, followed an unknown route, and had an unknown destination. During the time of the incident, the area was experiencing low ceilings and restricted visibilities.
Examination of the wreckage revealed that the aircraft collided with a 46-degree slope of the mountain during a high-speed descent. The impact angle was approximately 45 degrees nose down. A white powdery substance, later identified as methamphetamine, was found widely distributed throughout the cabin area and the surrounding ground at the accident site.
The investigation
No pre-impact mechanical malfunctions or failures were identified during the examination of the wreckage. The aircraft had not undergone an annual inspection in two years prior to the event. Additionally, the last documented flight review for the pilot was conducted in August 1983.
Toxicological tests performed on the pilot yielded negative results for alcohol and all other drug substances.