What was found
NR 3 ENGINE WENT TO UNCONTROLLABLE HIGH POWER ON TAKEOFF. ABORTED TAKEOFF AT 60 KNOTS. ENGINE SHUT DOWN WITH SHUT OFF LEVER. *S/D* MECHANICAL ERROR. TORQUE AND SAFETY OF NUT AT FUEL CONTROL THROTTLE LEVER WAS NOT ACCOMPLISHED, ALLOWING CONTROL LINKAGE TO BE DISCONNECTED. AIRCRAFT WAS RETURNED TO SERVICE AFTER ACCOMPLISHING PROPER INSTALLATION OF HARDWARE, FUEL CONTROL UNIT TRIM, AND ENGINE FUNCTIONAL RUN.