What was found
CLT - FLT 357 - DURING CRUISE AT FL330 WITH AUTOTHROTTLE ENGAGED, NR 1 THROTTLE BEGAN MOVING 1 OR 2 INCHES IN EITHER DIRECTIONS. POWER WAS CHANGING WITH THROTTLE MOVEMENT. CAPT DISCONNECTED AUTOTHROTTLE AND NR 1 THRUST LEVER BECAME FROZEN AT CRUISE POWER. NR 1 THRUST LEVER COULD NOT BE MOVED MANUALLY OR WITH AUTOTHROTTLES. AN EMERGENCY WAS DECLARED AND FLT DIVERTED TO CLT. NR 1 ENG WAS SHUT DOWN 10 MINS PRIOR TO LANDING TO ELIMINATE CRUISE POWER ON LANDING. AFTER THE NR 1 ENG WAS SHUT DOWN, THRUST LEVER WAS FREE TO MOVE TO IDLE WHERE IT WAS THEN LOCKED IN POSITION. FLT LANDED WITHOUT FURTHER INCIDENT. MX FOUND A BENT ACT ARM FOR SWITCH S-139 ON AUTOTHROTTLE CLUTCH. R/R'D LEFT AUTOTHROTTLE CLUTCH SERVO