Primary finding
Probable cause
The pilot's failure to maintain directional control during the landing roll, which resulted in a ground-loop.
Investigator assessment
Analysis narrative
The pilot of a tailwheel equipped airplane reported that, during the landing roll, his foot “popped off” the rudder pedal and the airplane ground loop to the left. The left main landing collapsed, the left wing impacted the runway surface and came to rest on the runway. The airplane sustained substantial damage to the left aileron. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.