What happened
The incident occurred while the aircraft was in the cruise phase of flight. The pilot experienced a sudden loss of engine power that was not attributed to mechanical malfunction. Consequently, the pilot initiated a forced landing procedure. The chosen landing area was characterized by the presence of scrub trees. During the descent and touchdown, the airplane collided with these trees, resulting in substantial damage to the airframe.
The investigation
Following the accident, investigators conducted a thorough examination of the aircraft's systems to determine the root cause of the power loss. The inspection focused heavily on the fuel delivery system. Technicians discovered that both the gascolator and the associated fuel lines were contaminated with dirt and debris. The origin of this foreign material could not be determined from the physical evidence. A comprehensive search for other mechanical issues yielded no additional findings, confirming that the engine failure was isolated to the fuel contamination.
Findings
The primary factor leading to the accident was the ingestion of contaminants into the engine's fuel system. The presence of dirt and debris in the gascolator and fuel lines restricted or interrupted fuel flow, causing the non-mechanical engine failure. This loss of power necessitated an emergency landing in unsuitable terrain, which directly resulted in the substantial damage observed upon inspection.
Safety message
Regular maintenance and pre-flight inspections are critical to identifying potential fuel system contaminants. Ensuring that fuel filters, gascolators, and lines are clean and free of debris is essential for preventing in-flight engine failures due to fuel starvation or contamination.