Primary finding
Probable cause
The pilot's inadvertent excessive braking during the landing roll due to momentary pain.
Investigator assessment
Analysis narrative
The pilot reported that on the landing roll on a grass field, he experienced a sharp pain in his left leg as he was applying the brakes. He inadvertently applied excessive braking and the airplane nosed over. The airplane came to rest on its back and sustained substantial damage to the fuselage, rudder, and vertical stabilizer. The pilot reported no mechanical failures or malfunctions with the airplane that would have precluded normal operation.
Source record
Factual narrative
The pilot reported that while landing off-airport in a grass field, he experienced a sharp pain in his left leg as he was applying the brakes. This caused him to inadvertently apply excessive braking and the airplane nosed over. The airplane came to rest on its back and sustained substantial damage to the fuselage, rudder, and vertical stabilizer. The pilot reported no mechanical failures or malfunctions of the airplane.