What was found
ON DESCENT, RIGHT ENGINE N1 LOW AT FH IDLE AT 15,000 (38 PERCENT), DIFFERENCE DROPPED AT LOWER ALTITUDE, NOTE ENGINE PARAMETERS WITH THROTTLE AT IDLE STOPS, AIRCRAFT TAIL SWAP WITH 819. FOUND RIGHT ENGINE EPR READING LOW, REMOVED AND REPLACED RIGHT EPR TRANSMITTER. CHECKED LEFT AND RIGHT ENGINE THROTTLE RIGGING, PART POWER STOPS DROPPED, ADJUSTED BOTH ENGINE FUEL CONTROL TRIMS, STOWED PART POWER STOPS. GROUND CHECKS GOOD. (M)