What was found
THE RT ENGINE SPOOLED UP UNCOMMANDED WITH BOTH THROTTLES AT IDLE. WHEN ON FINAL AT 2000' AGL, 170 KNOTS, WITH LT ENG IN FLIGHT IDLE, THE RT ENGINE WAS APPROXIMATELY 1.33 EPR, 74% N1 590 EGT, N2, N3 & FUEL FLOW ALL CORRESPONDING TO THE RT ENG STABILIZED AT A HIGH PWR SETTING. THE LT ENGINE WAS NORMAL AT ALL TIMES. DURING SUBSEQUENT APPROACH THE RT ENGINE REMAINED AT A HIGH POWER SETTING WITH THE RT THROTTLE AT IDLE. QRH PROCEDURES FOLLOWED TO SHUTDOWN RT ENGINE. REPLACED RT ENGINE FUEL FLOW GOVERNOR IAW AMM 73-21-01-4-4.