Incident Overview
A helicopter was being repositioned onto a trailer when the tail swung to the left and struck a dirt bank located 25 feet from the trailer. The pilot, unable to maintain control, attempted to land. During the landing attempt, the right skid touched down on the trailer. As the helicopter settled, it rolled over onto its left side.
Pilot Report
The pilot reported that the right turn was uncontrollable. No further details regarding the pilot's actions or the sequence of events were provided in the source.
Post-Accident Investigation
An investigation conducted by the Federal Aviation Administration (FAA) revealed no evidence of mechanical failure or malfunction. However, the continuity of the control rods and cables to the tail rotor could not be determined because the entire tail assembly had separated from the tail boom.
Conclusion
The source provides no explicit probable cause for the accident. The investigation confirmed the absence of mechanical failure, but the reason for the loss of control remains unspecified.