What was found
YVR - FLIGHT CONTROL - DURING C-16 CHECK THE HORIZONTAL STABILIZER MANUAL TRIM WAS FOUND TO HAVE 3/4 TURN SLACK IN EITHER UP OR DOWN DIRECTION. MAINTENANCE FOUND LT AND RT STAB HINGE FITTINGS FRETTING AROUND BEARINGS; REMOVED AND REPLACED LT AND RT HINGE FITTINGS AND BEARINGS IAW BMM 27-41-31, PG 401, AND ER 03-5512-03094-TB1. ALSO FOUND DRUM ON STAB TRIM ACTUATOR CAN BE TURNED 1/4 TURN WITHOUT MOVING JACK SCREW; REMOVED AND REPLACED STAB TRIM GEARBOX ACTUATOR IAW T/C R6C27008. FUNCTIONAL CHECK OF STAB TRIM SYSTEM C/W IAW T/C F6A27005. VENDOR TEARDOWN OF STAB TRIM ACTUATOR S/N KE000458 CONFIRMED FAILURE DUE TO NUMEROUS WORN PARTS. REPLACED WORN BEARINGS.