What was found
ON LAST FLIGHT OF THE DAY, ROLLED THE GAS PRODUCER N1 CONTROL TO FLIGHT IDLE. UNABLE TO SHUT ENGINE OFF WITH THROTTLE CONTROL. ENGINE HAD TO BE SHUT DOWN MANUALLY. UPON INVESTIGATION, FOUND CABLE ASSY BROKEN UNDER PILOT'S SEAT DECK. FAILED PART, POSSIBLY BECAUSE OF FATIGUE, FAILED AT BEGINNING OF 180 DEGREE BEND IN CABLE ASSEMBLY.