NTSB Factual Report

The pilot reported that during engine start, he used small chocks around the tires and did not tie down the tail of the airplane. During his first attempt to hand-prop the engine, it did not start. He then advanced the throttle "very slightly." The engine subsequently started and as the pilot was moving to the cockpit, the rpm increased. The airplane taxied out of the small chocks, began turning in circles, and the pilot grabbed the right horizontal stabilizer. The airplane continued to circle, dragging the pilot, and struck a parked airplane before coming to rest. Examination of the airplane by a Federal Aviation Administration inspector did not reveal any preimpact mechanical malfunctions, nor did the pilot report any. The inspector noted substantial damage to the empennage.

NTSB Probable Cause

The pilot's failure to properly secure the airplane before hand-propping the engine for startup.