On April 19, 1989, an Air Tractor AT-502 (registration N7320C) operated by Kubecka Flying Service was involved in an aviation accident near Ganado, TX. Investigators recorded the probable cause as: LOSS OF DIRECTIONAL CONTROL FOR AN UNKNOWN REASON. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During landing, a veer to the right led to left main landing gear and strut separation. The pilot reported a locked right brake; post-accident inspection found no cause.
Accident Summary
During the landing sequence, the aircraft veered to the right. This resulted in the separation of the left main landing gear and strut, causing the aircraft to settle onto the left wing. The event occurred without any prior indications of mechanical issues.
Pilot Report
According to the pilot, the right brake locked during the landing, which caused the aircraft to yaw to the right. The pilot's account provided a direct explanation for the veering motion observed.
Post-Accident Inspection
A thorough inspection of the right brake system was conducted following the accident. The inspection did not reveal any reason for the brake to have locked. The wheel was found to be free to rotate, and the master cylinder appeared to be in proper working order. No anomalies were detected that could account for the reported brake lock.