Summary
During the landing roll of an airplane carrying a load of herbicide, the aircraft began to veer to the left. The pilot attempted to correct by applying right rudder and right brake, but the controls did not respond. The airplane then ground looped to the left, and the right main landing gear separated from the aircraft. Subsequent examination revealed that the right brake's master brake cylinder had failed.
Narrative
The pilot reported that he was landing with a load of herbicide. As the airplane rolled along the runway, it started to veer left. Despite his inputs of right rudder and right brake, the airplane failed to respond and continued turning left. The ground loop maneuver resulted in the detachment of the right main landing gear. The pilot also noted that all four wings appeared wrinkled, with the lower right wing being bent upward.
Investigation Findings
Postaccident inspection of the right brake system disclosed that the master brake cylinder had malfunctioned. No other mechanical issues were reported. The aircraft's damage included the separated landing gear and wing deformation.
Probable Cause
The investigation report did not state a probable cause for the accident.