NTSB Identification: FTW99FA006.
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Accident occurred Sunday, October 11, 1998 in OKLAHOMA CITY, OK
Probable Cause Approval Date: 05/08/2001
Aircraft: Cessna 172M, registration: N172JF
Injuries: 1 Fatal.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
Witnesses observed the airplane roll into a steep bank and descend vertically into the ground. Examination of the airframe and engine revealed no mechanical discrepancies that would have prevented normal operation. The operator observed the airplane taxiing for takeoff at a high speed. He called the air traffic control tower and requested that the controller relay a message to the pilot to return to the ramp. The airplane had taken off by the time the message was relayed. Although the pilot acknowledged receiving the message, radar data indicated the airplane did not turn back toward the airport, but continued toward the accident site. The site was located adjacent to a church where a friend of the pilot was attending services. The friend had reportedly declined a marriage proposal from the pilot the night before the accident. The medical examiner classified the pilot's death as a suicide. Toxicological testing detected 0.028 ug/ml diazepam (Valium) in kidney tissue, 0.077 ug/ml diazepam in liver tissue, 0.134 nordiazepam (metabolite of diazepam) in liver tissue, and 0.069 ug/ml nordiazepam in kidney tissue. The FAA does not approve the use of diazepam by pilots.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: Suicide. Full narrative available
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