What happened
The pilot communicated with air traffic control to report experiencing severe engine trouble. The engine was described as running roughly, with symptoms suggesting it was starving for fuel. Subsequently, the aircraft wreckage was located in an open field. Investigators noted a tree situated 500 feet from the main wreckage site that exhibited impact damage.
The investigation
A detailed examination of the aircraft components was conducted to determine the mechanical cause of the failure. Inspectors focused on the fuel system components, specifically looking for evidence of fuel starvation or blockage.
Findings
The investigation identified a critical mechanical failure within the fuel system. A synthetic seal located inside the fuel injector servo was found to be separated into two distinct pieces. This separation compromised the integrity of the component, which allowed fuel to migrate to the impact tubes. This mechanical failure is consistent with the pilot's report of engine roughness and fuel starvation prior to the crash.
Safety message
Regular inspection of fuel system seals and injector servos is critical to prevent similar failures. Ensuring the integrity of synthetic seals can help maintain proper fuel flow and prevent engine malfunction during flight.