What happened
The pilot reported experiencing a complete and sudden loss of engine power while the aircraft was established on the final approach to land. Due to the immediate lack of thrust, the pilot was unable to maintain altitude or reach the runway. Consequently, the aircraft had to be landed on unsuitable terrain in the vicinity of the airport.
The investigation
Following the accident, investigators examined the aircraft's fuel system to determine the root cause of the power loss. The inspection revealed that a fuel line leading to the selector valve was partially blocked by an unidentified rubber-like foreign material. This obstruction restricted fuel flow to the engine, resulting in the failure.
Findings
The primary factor contributing to the accident was the partial blockage of the fuel line by foreign material. This mechanical issue directly led to the fuel exhaustion and subsequent forced landing on terrain not designed for aircraft operations.