Accident Sequence
During takeoff and initial climb, the engine experienced six intermittent power interruptions described as "missing." The airplane initiated a left turn toward the airport, after which the engine lost all power. Subsequently, the airplane struck trees and impacted a field approximately one-half mile north of the airport.
Post-Accident Examination
Examination of the wreckage revealed that the fuel selector was positioned between "LH TANK" and "OFF." However, investigators could not verify the pre-impact position of the fuel selector. After the accident, several engine components were replaced or repaired due to impact damage, and a successful test run of the engine was completed.
Aircraft Maintenance History
Review of the airplane's maintenance records showed that the fuel system had been replaced about five months prior to the accident, following several reports of engine power losses during landing rolls. Shortly after the replacement, a fuel leak was discovered and corrected. Following the correction, the airplane flew approximately 14 hours over the five-month period with no known engine discrepancies.
Pilot Toxicology and Medical Information
Toxicological testing for the pilot in command revealed the presence of doxylamine, a sedating over-the-counter antihistamine commonly found in multi-symptom cold relievers such as NyQuil and sleep aids such as Unisom. The level of doxylamine was consistent with ingestion of the maximum single over-the-counter dose of a sleep aid within a few hours prior to the accident. Post-accident interviews with the pilot's wife indicated that he was suffering from common cold symptoms, including coughing and congestion. The pilot was treating the cold with NyQuil at night and non-drowsy Sudafed during the day.