Engine Failure and Fire
During an engine start, an engine failure occurred followed by a fire. The fire was present on the nose wheel below the engine, indicating that it was likely fed by a fluid. The extent of damage to both the engine and the aircraft was such that the reasons for the engine failure could not be determined. Similarly, the damage prevented identification of the fire's origin.
Emergency Procedure Execution
After the engine fire was identified, the engine was shut down, and cranking was not continued in accordance with the emergency procedure. It was noted that continued cranking may have extinguished the fire before it became unmanageable. Following engine shutdown, the fuel shutoff valve was not closed, which would have provided a barrier between the fuel tanks and the engine. Failure to complete this step of the engine fire during start emergency procedure increased the likelihood of the fire and allowed it to intensify.
Investigation Findings
The investigation was limited by the extensive damage. No specific cause for the engine failure or the fire was established. The incomplete execution of the emergency procedure was documented as a contributing factor to the fire's progression.