What happened
During the flare for landing, the pilot noticed an audible "click" while moving the throttle to the idle position. Following this sound, there was no reduction in engine power. The pilot reported that the throttle felt extremely loose and appeared disconnected from the engine.
As a result of the malfunction, the engine transitioned to full power, causing the turbocharger overboost light to illuminate. With the aircraft maintaining an airspeed of 120 knots, the pilot aborted the landing attempt. During the subsequent maneuvers to land the aircraft, the engine power fluctuated from a mid-power range and then surged to a higher power setting.
The pilot was forced to execute an off-airport landing. During the excursion, the aircraft collided with a fence and light poles. The impact resulted in a fire that destroyed the aircraft. There were no injuries reported.
The investigation
An examination of the aircraft revealed that the throttle cable had failed. The failure was attributed to high cycle fatigue, which directly caused the uncontrolled engine power conditions experienced by the pilot.