NTSB Factual Report

The pilot stated that the airplane was tied down on the right side, and the right main landing gear wheel was chocked. After hand-propping the engine, the airplane's tie-down rope "came loose," and the airplane "veered" into an adjacent hangar. The right wing sustained substantial damage. The pilot stated that the accident could have been prevented by "using a better quality tie-down rope, having a second pilot in the airplane holding the brakes, or by having both wheels chocked instead of just one."

NTSB Probable Cause

The pilot's failure to properly secure the airplane before attempting to hand-prop the engine.