Witness Accounts
A witness who observed the airplane after a landing reported hearing the engine power up, then reduce power, then power up again. The witness looked toward the sound and saw the airplane in the grass, "fishtailing as would a wheelbarrow." The airplane missed a group of fuel pumps, continued down a hill, collided with parked cars next to a hangar at what appeared to be a high rate of speed and full throttle, then exploded.
Another witness heard the airplane at "high power," then saw it on the ground and "out of control." This witness noted that the airplane missed the fuel pumps but proceeded "down the taxiway until it impacted the hangar and immediately burst into flames."
A third witness heard the airplane "power up, then back to about idle, then full power," but did not see the airplane, only heard the impact.
Accident Sequence
Wheel tracks in the grass were consistent with the airplane entering a left skid, followed by the nosewheel centering, then a right skid, before the nosewheel again centered. The airplane continued down a small hill, first in a slight right turn, then turned back toward the impact site. The airplane subsequently struck a parked airplane with its left wing, then collided with parked vehicles, and burst into flames next to a hangar. The total distance traveled off the runway was about 1,100 feet.
Wreckage Examination
The airplane was consumed by fire, except for the left wing and portion of the left cabin area. The only flight control surfaces that could be accounted for were the left wing flap and aileron. However, all flight control cables were found, and continuity was confirmed to where the cables would have joined their corresponding surfaces. Threads on the pitch trim actuator corresponded to an approximately "slightly nose down" trim position. An examination of the engine revealed no catastrophic failures, and both propeller blades were fractured, consistent with power at impact.
Maintenance History
According to the airplane's maintenance log, the stabilator bearings were removed and replaced on July 16, 2004. The last two pilots to fly the airplane before the accident pilot, together 6 and 5 days before the accident, reported no mechanical anomalies.
Pilot Information
The pilot reported 140 hours of flight time, and there was no evidence of pre-accident physical impairment.