What was found
CLT - ON DESCENT INTO CLT, CREW REPORTED THE NUMBER 2 THROTTLE WAS BINDING WITH AUTO THROTTLES ON. NUMBER 2 THROTTLE DOES NOT MATCH NUMBER 1 THROTTLE WITH POWER CHANGES; 2 THROTTLE KNOB WIDTHS. SOMETIMES IT "BREAKS" LOOSE AND MATCHES NUMBER 1 WITH A SEVERE JERKY MOVEMENT. ON DESCENT, IT WAS VERY DIFFICULT TO PULL TO IDLE. CREW SHUT DOWN THE NR 2 ENGINE AS A PRECAUTION AND LANDED WITHOUT FURTHER INCIDENT. AN EMERGENCY WAS DECLARED. TOTAL SINGLE ENGINE TIME WAS REPORTED TO BE: 22 MINUTES AND 25 SECONDS. MAINTENANCE FOUND THE NR 2 ENGINE THRUST CONTROL PUSH-PULL CABLE BINDING INTERNALLY. REMOVED AND REPLACED CABLE ASSEMBLY PER MM 76-11-07. ACCOMPLISHED ADJUSTMENT PER MM 76-11-00. PERFORMED PART POWER AND TAKEOFF POWER CHECKS DURING ENGINE RUN. AIRCRAFT OK FOR SERVICE.