Accident Summary
The aircraft was being maneuvered for a landing on a ground support trailer. During this maneuver, a power failure occurred. Because high trees were present, the pilot executed an autorotation to an adjacent field. The aircraft then touched down on rough and uneven terrain. Upon landing, the aircraft rolled over.
Investigation Findings
The investigation revealed that the fuel system was contaminated. Approximately one gallon of a white milky substance was drained from the fuel sump. All major components of the fuel system, including the fuel lines, filters, and pumps, were contaminated. Investigators were unable to determine the origin of the contamination.