What happened
The flight was interrupted when the engine oil pressure decreased to zero, leading to a total loss of engine power. The pilot initiated a forced landing procedure to avoid a more severe outcome. During this emergency descent, the right wing of the aircraft made contact with overhead wires. This collision caused the airplane to lose control and impact the ground before reaching the intended landing field.
The investigation
A thorough examination of the wreckage was conducted to determine the mechanical cause of the failure. Investigators found that engine oil had leaked from the area surrounding the oil filter. This leak continued until the engine was completely depleted of oil, which explains the sudden drop in pressure and subsequent power loss.
Findings
The pilot reported that he had changed the engine oil just one day prior to the flight. However, he did not perform a test run of the engine before takeoff to check for potential leaks. This omission allowed the leak at the oil filter to go undetected until it caused an in-flight emergency.