Accident Overview
On an unspecified date, a banner-towing airplane was observed by witnesses during a flight. The aircraft made a low pass that appeared to be an attempt to pick up a banner; however, it did not retrieve the banner. Subsequently, the airplane climbed at an excessive pitch angle, then banked to the left and impacted the ground.
Investigation Findings
An examination of the airframe and engine revealed no preimpact mechanical anomalies. The most recent annual inspection had been completed two months prior to the accident, with no anomalies noted.
Pilot Information
The pilot reported approximately 5,900 total hours of flight experience, of which 21 hours were in the accident airplane.
Conclusion
The accident investigation did not identify a mechanical cause for the loss of control. The circumstances surrounding the pilot's actions during the attempted banner pickup and subsequent climb remain under investigation.