Primary finding
Probable cause
The pilots encounter with an obstructed dip in the landing surface during the landing roll out on a remote airstrip, which resulted in a noseover.
Investigator assessment
Analysis narrative
The pilot landed a tailwheel equipped airplane on a remote airstrip. During the landing rollout, while reducing engine power and holding the control stick fully aft, the airplane encountered an obstructed dip in the airstrip surface. As the airplane rolled through the dip, the pilot was unable to arrest the resulting nose down pitch. The airplane subsequently nosed over and came to rest inverted, sustaining substantial damage to the rudder and left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions that would have precluded normal operation of the airplane.