Incident Overview
Witnesses observed the aircraft initiating a slow roll maneuver. As the aircraft became inverted, the roll rate slowed, the nose dropped toward the ground, and the aircraft subsequently crashed.
Investigation Findings
Post-crash examination revealed no evidence of preimpact part failure or malfunction. The aircraft was not certified for aerobatic flight.
Toxicology Analysis
Toxicological tests of the pilot's gastric contents, kidney fluids, and bile showed small amounts of alcohol: 0.03%, 0.05%, and 0.02%, respectively. The proportion of alcohol attributable to putrefaction was not determined.
Conclusion
The investigation documented the sequence of events and the aircraft's non-certification for aerobatics, but no specific cause was stated in the source.