What was found
(CAN) DURING A SCHEDULED 1200-HOUR CHECK, A FUNCTIONAL TEST OF THE RIGHT THRUST REVERSER AUTO THROTTLE RETARDER WAS CARRIED OUT. THE RIGHT THROTTLE FAILED TO RETURN TO IDLE POSITION WITH THE THRUST REVERSERMANUAL DEPLOYMENT. UPON INVESTIGATION IT WAS DISCOVERED THAT THE AUTO DEPLOYMENT RETARDER CABLE WAS BROKEN AT THE INNERSLEEVE WHERE IT ATTACHES TO THE THREADED ADJUSTER.