What was found
UPON LANDING, FOR CARGO TRANSPORT, THROTTLE WAS REDUCED TO FLIGHT IDLE BUT ENG RPM STAYED THE SAME, THROTTLE WAS OPENED AND CLOSED SEVERAL TIMES WITH NO EFFECT ON ENG RPM. FINALLY, PILOT SHUT ENGINE OFF BY TURNING THE MAIN FUEL SHUT OFF AND NOTIFIED MAINTENANCE. MECHANIC, UPON INSPECTION, DISCOVERED THAT INNER CABLE WS SEVERED 2 FT FROM THE THROTTLE IN THE COCKPIT. REMOVED AND REPLACED THE CABLE AND THE AC WAS RETURNED TO SERVICE UPON COMPLETION OF FUNCTION CHECKS IAW MM. (K)