What was found
CREW REPORTED THAT THE RT ENGINE WAS UNRESPONSIVE ON APPROACH. SHUT THE ENGINE DOWN AT 20K DURING DECENT. THE RIGHT ENGINE DID NOT RESPOND. ENGINE WAS STUCK AT IDLE. THE ENGINE BEGAN CREEPING UP TO 1.4 EPR, WHICH WAS TOO MUCH FOR LANDING. THE FLIGHT CREW ELECTED TO SHUTDOWN THE RT ENGINE. MAINTENANCE FOUND THE THROTTLE FLEX CABLE DISCONNECTED AT AFT THE THROTTLE QUADRANT IN THE AFT CARGO BIN. REPLACED THE FLEX CABLE, RAN ENGINE, AND OPS CHECKED NORMAL.