What happened
The incident occurred during the initial climb phase of an agricultural (ag) flight. The pilot reported experiencing a sudden loss of engine power while airborne. At that moment, the aircraft was at an altitude of approximately 30 feet above ground level (AGL). Recognizing the emergency, the pilot attempted to execute an emergency landing procedure.
However, the available altitude was insufficient for the aircraft to negotiate a turn back toward the road from which it had departed. During the attempt to maneuver, the aircraft collided with a berm. The impact caused the aircraft to nose over.
The investigation
A mechanical examination of the engine was conducted following the accident. The inspection revealed significant internal damage. Specifically, cracks were found in cylinder number 7. These structural failures were determined to have resulted in improper combustion within the engine cylinder.
Findings
The primary factor leading to the accident was the loss of engine power. This power loss was directly caused by the mechanical failure identified during the examination. The cracks in cylinder #7 prevented proper fuel-air mixture combustion, resulting in a complete loss of thrust. The pilot's inability to maintain controlled flight was due to the low altitude at which the failure occurred, leaving no margin for error or recovery.
Safety message
This accident highlights the critical importance of regular engine inspections and maintenance. Early detection of cylinder cracks can prevent in-flight power losses that leave pilots with insufficient options for safe recovery, particularly during low-altitude agricultural operations.