What happened
The aircraft encountered a mechanical failure involving the propeller system while in flight. As a result of this malfunction, the pilot initiated a forced landing procedure. The aircraft did not reach the intended clearing and instead impacted a line of trees short of the open area.
The investigation
Following the accident, investigators attempted to determine the specific cause of the propeller failure. However, the process was significantly complicated by the extensive damage sustained during the impact with the trees. This destruction obscured critical evidence needed to identify the root mechanical issue.
Findings
The aircraft documentation included placards warning against continuous high RPM operation. These warnings were intended to prevent fatigue caused by resonant vibrations. The investigation noted that the impact damage made it difficult to verify if these operational limits were exceeded prior to the failure.