Background
The incident occurred during a flight that had recently departed from an airport. After takeoff, the pilot turned the aircraft onto the downwind leg of the traffic pattern. At that time, a thunderstorm was situated to the northwest of the airport. Subsequently, the aircraft encountered heavy turbulence. Following this encounter, the aircraft was stabilized, and the pilot decided to proceed with a landing.
Approach and Uncommanded Bank
After the decision to land, the aircraft turned onto the final approach leg. During this phase, the pilot reported that the aircraft entered an uncommanded bank of 90 degrees. The pilot attempted to correct the anomalous attitude but was unable to prevent the aircraft from descending with its nose and right wing low. The descent continued until the aircraft contacted the ground. After impact, the aircraft slid to a stop.
Damage Inspection
Post-accident examination revealed damage to several components of the aircraft. Specifically, the propeller, engine mount, right wing, and right main landing gear were damaged.