What was found
(CAN) RT ENGINE WOULD NOT SHUTDOWN AT GATE WITH THRUST LEVER AT SHUT OFF POSITION. MAINTENANCE REPLACED THE RT THROTTLE CONTROL GEARBOX ASSY AND RT MAIN FUEL CONTROL UNIT. AIRCRAFT RETURNED TO SERVICE. PARTS REPLACED: THROTTLE CONT GEAR BOX ASSY, P/N: 2100140-007, S/N: 601, MAIN FUEL CONT, P/N: 6078T55P09, S/N: WYG85422,