What was found
WHEN AIRCRAFT WAS DESCENDING FOR APPROACH INTO DFW, FOUND RT POWER LEVER STUCK AT 19,500 FEET. CAPTAIN LEVELED OFF DUE TO POSSIBLE OVERTORQUE OF THE ENGINE. ECS SYSTEM SELECTED TO THE OFF POSITION, POWER LEVER THEN FREED ITSELF. ON LANDING AFTER INSPECTING ACFT AND RUNNING ENGINE, NO FAULTS FOUND. ONE POSSIBLE CAUSE COULD HAVE BEEN ICING. CABLES WERE THEN CLEANED AND LUBED PER SB 328-76-073, WHICH HAD BEEN C/W AT A PREVIOUS DATE. NO OTHER PROBLEMS OCCURRED AND ACFT RETURNED TO SERVICE. HOWEVER, LT AND RT POWER LEVER NACELLE PORTIONS REPLACED AT THE NEXT VISIT TO MAINTENANCE ON 2-8-97 AS PRECAUTION.