Accident Overview
The airplane crashed in a wooded area, fatally injuring the pilot. No witnesses observed the accident. The accident occurred during daylight hours with visual meteorological conditions prevailing.
Aircraft and Propeller Examination
Examination of the propeller revealed little or no chordwise damage, with blades bent aft, consistent with little or no rotation at impact. Inspection of the fuel system found evidence of water contamination and corrosion in the fuel sump, fuel boost pump, and carburetor. However, investigators could not determine whether this contamination led to a loss of engine power. Additionally, the fuel selector valve was positioned midway between the left and right tanks, but it could not be determined if this occurred before impact or if it would have caused a loss of engine power.
Pilot Medical History and Toxicology
The pilot had not obtained a Federal Aviation Administration medical certificate since 1984. His medical history included diabetes, congestive heart failure, multiple coronary stents, and the implantation of a defibrillator/pacemaker. According to the investigation, the pilot's serious heart disease would have put him at high risk of impairment, incapacitation, or distraction. Toxicology testing revealed the presence of gabapentin and carvedilol in the blood and urine. Gabapentin, an antiseizure medication also used for chronic pain, has known adverse psychomotor effects. Despite the pilot's medical history and toxicology findings, the investigation could not positively determine whether the pilot was impaired at the time of the accident.
Mechanical Examination
Examination of the airplane, its systems, engine, and propeller showed no evidence of pre-crash mechanical failure or malfunction.