What was found
NR 1 ENG RPM FLUCTUATED FROM IDLE & 90 % WITH CONCURRENT NR 1 THROTTLE MOVEMENT. NR 2 & 3 ENG VIA AUTOTHROTTLE SYS RESPONDED IN OPPOSITE DIRECTION TO COMPENSATE SPEED ERRORS. AUTOTHROTTLES SWITCHED TO OTHER SYS WITH NO CORRECTION NOTED. AUTOTHROTTLE SYS DISCONNECTED & NR 1 ENG PLACED AT IDLE FOR REST OF FLT. ON FINAL, NR 1 ENG FLAMED OUT. NO INDICATION OF ENG DAMAGE NOTED. ALL FUEL BOOST PUMP PRESSURES GOOD. INSTALLED NR 1 ENG MAIN FUEL PUMP & MEC ASSY REF AMM 73-12-01-2 UP TO STEP 3 B (22). COMPLETED INSTALL & RIG OF NR 1 ENG FCU, PUMP & VSV REF AMM 73-20-01-2 & 73-12-01. PERFORMED ENG TRIM ADJUSTMENT IAW 73-20-01-2. ENG IDLE, FLT IDLE, PART POWER & MAX POWER. OPS CHECK GOOD IAW JRH & MM 73-20-01-2.