Accident Description
Approximately three and a half hours after departure on a cross-country flight, the airplane impacted mountainous terrain. The accident occurred during daylight hours in visual meteorological conditions. Radar data and examination of the accident site indicated that the airplane was in level flight at a constant airspeed immediately before impact.
Investigation Findings
Investigators found no evidence of pre-impact engine or airframe anomalies that would have prevented normal operation. The airplane's flight path and impact signature were consistent with controlled flight into terrain.
Toxicology Results
Toxicology testing of the pilot's muscle and liver specimens revealed the presence of five different medications used for the treatment of mental disorders. The pilot, a neurosurgeon, had indicated on his most recent application for an airman medical certificate, filed less than two months before the accident, that he was not taking any medications and had no medical conditions. That application also noted that the pilot's medical license had been revoked.