Accident Sequence
Witnesses observed the airplane flying low on the final approach to the runway. The aircraft then impacted trees approximately 50 feet in height, followed by a ground impact in a steep nose-down attitude. The airplane had been observed performing touch-and-go landings for about 15 minutes prior to the accident.
Aircraft Examination
A postaccident examination of the airplane revealed no preexisting anomalies that would have precluded normal operation. The airframe and systems appeared to be in working order, with no mechanical or structural failures identified.
Toxicology Report
Toxicological testing of the pilot detected the presence of imipramine and diphenhydramine. Imipramine is known to have a detrimental effect on driving skills and other cognitive functions. Diphenhydramine can cause drowsiness. The specific impact of these substances on the pilot's performance during the accident sequence is not detailed in the report.
Conclusion
The investigation did not assign a probable cause for the accident. The presence of impairing medications in the pilot was noted, but no direct causal link was established in the source.