Primary finding
Probable cause
The pilot's improper planning/decision and exceeding the design stress limits of the aircraft, which resulted in overload failure of the wing and subsequent uncontrolled collision with the terrain. Factors related to the accident were: the pilot's failure to follow procedures and directives, his attempt to perform aerobatic maneuvers with a non-certificated aircraft, and subsequent entanglement of the parachute in the propeller during its deployment.