What happened
During the cruise phase of flight, the engine of the aircraft lost power. The pilot was forced to perform an emergency landing on rough and uneven terrain. As a result of the impact with the ground, the airplane sustained substantial damage. The pilot reported that they were unaware of the specific nature or the origin of the engine power loss.
The investigation
Following the accident, the aircraft was moved to a different location for examination. An inspection of both the airframe and the engine was conducted, but investigators found no mechanical anomalies. During the process, the top spark plugs were removed and were noted to have brown deposits on them.
Upon removal of the wings, it was determined that no fuel remained in the fuel tanks. Investigators examined the fuel present within the lines, which appeared blue in color and showed no signs of contamination.