What happened
The aircraft experienced a complete engine failure shortly after takeoff while operating at an altitude of approximately 500 feet above ground level. Following the loss of power, the pilot initiated a forced landing. During this emergency descent and landing sequence, the aircraft collided with two fences, resulting in substantial damage to the airframe.
The investigation
A thorough examination of the engine revealed that the fuel pump ejector nozzle was obstructed. Specifically, foreign material identified as rust accounted for an 80% blockage within the nozzle. This restriction prevented proper fuel flow and caused the pump to over-pressurize.
Findings
The mechanical failure was directly linked to the condition of the fuel system components. The analysis determined that the restriction in the ejector nozzle led to cavitation within the fuel pump. This cavitation, combined with the blockage, resulted in the complete loss of engine power during the critical early phase of flight.