What happened
A commercial pilot operating an Air Tractor AT301 was en route to the base of operations at Taylor, Texas, when the flight was interrupted by mechanical issues. During the cruise portion of the flight, the aircraft began experiencing severe vibration. Recognizing the severity of the situation, the pilot executed a forced landing on a soft field near the destination.
During the landing roll, the aircraft nosed over. Despite the substantial damage sustained by the airframe, the pilot managed to escape without injury.
The investigation
Following the accident, investigators examined the wreckage of the Air Tractor AT301. The examination revealed that one propeller blade had failed at a point approximately 10 inches from the blade tip. This structural failure was identified as the primary cause of the severe vibration experienced during flight.
Findings
The investigation determined that the sequence of events began with the propeller blade failure. This mechanical issue led to severe vibration in the aircraft, necessitating an emergency landing. The pilot's decision to land on a soft field resulted in the aircraft nosing over, causing substantial damage to the airframe. However, the pilot was not injured in the incident.
Safety message
This incident highlights the critical importance of regular maintenance and inspection of propeller systems to detect potential fatigue or structural weaknesses before they lead to in-flight failures.