What happened
The incident occurred during an aerial application flight while the aircraft was operating at low altitude after takeoff. While maintaining cruise flight, the aircraft experienced a sudden mechanical loss of engine power. Unable to maintain altitude or reach a suitable runway, the pilot initiated a forced landing procedure.
The aircraft landed on a hillside characterized by mountainous and hilly terrain. The impact with the ground caused significant structural damage to the airframe. Immediately following the collision, a fire broke out within the wreckage. The intensity of the post-impact fire was sufficient to completely destroy the aircraft.
The investigation
Investigative efforts focused on determining the root cause of the mechanical failure that led to the loss of power. Examination of the engine components and maintenance records revealed that the engine had suffered from a critical depletion of lubricant. This depletion was not due to normal consumption or an unexpected leak, but rather stemmed from improper maintenance practices prior to the flight.
Findings
The primary factor contributing to the accident was the mechanical failure of the engine. The loss of power was directly attributed to the loss of engine oil. This oil loss was a direct result of improper maintenance procedures performed on the aircraft. The combination of mechanical failure and difficult terrain led to the destruction of the aircraft via fire.
Safety message
Proper maintenance is critical for aviation safety. Ensuring that all lubrication systems are correctly serviced before flight prevents catastrophic mechanical failures.