Incident Details
During the takeoff roll on the 35th and final flight of the day, the pilot observed that the turboprop engine's RPM remained in the low governing range, insufficient for takeoff thrust. The pilot then selected reverse thrust, which produced no result. To avoid impact with obstructions, the pilot intentionally ground looped the airplane.
Pilot Actions
Upon recognizing the power deficiency, the pilot attempted to use reverse thrust but received no response. With limited remaining runway and obstacles ahead, the pilot deliberately executed a ground loop to steer the aircraft away from hazards, bringing it to a stop.
Post-Inspection Findings
After the incident, the pilot reported that the oil supply line to the propeller governor had become disconnected. Subsequent disassembly and testing of the engine, fuel control, and governor revealed no other discrepancies.