Narrative
A pilot intended to fly over the local area and return to the airport. The plan included three circular passes over a family banner placed on the tarmac. During the maneuver, the airplane was observed to be very low and very slow, approximately 100 feet away and 75 feet above ground level as it crossed the tarmac.
As the pilot transmitted information about the turns, a stall warning horn was audible in the background. Shortly thereafter, the airplane began to wobble. Just before reaching a large hangar, the nose pitched up and the entire aircraft turned left by about 160 degrees. It first contacted the ground on its left wing, then struck the ground with its front end.
Pilot Account
The pilot reported that the airplane was functioning normally before the accident. However, he believed he was flying too slow and too low, with an aft center of gravity, which may have contributed to the loss of control.
Witness Account
A witness confirmed the airplane was extremely low and slow during the maneuver. The witness heard the stall warning horn in the pilot's transmissions and saw the aircraft wobble before the abrupt left turn and impact.