What was found
ON TAKEOFF WITH AUTO THROTTLE ENGAGED ENG #1 N1 FLUCTUATED RAPIDLY FROM 85-89% FLUCTUATIONS CEASED AFTER 3 MINUTES/ CLIMB THRUST SELECTED COMMANDED N1 WAS 87.0%<[01] PER POWER PLANT ENGINEERING FMU REQUIRES REPLACEMENT. REMOVED AND REINSTALLED MAIN FUEL PUMP DRAIN PLUG IAW AMM 73-11-01. REMOVED AND REINSTALLED MAIN FUEL FILTER HOUSING DRAIN PLUG IAW AMM 73-11-02.;[02] SEE TTG8Q00WAHBW FOR FDR DOWNLOAD FOR POWERPLANT ENGINEERING IAW AMM 31-31-00 AWAITING FURTHER DIRECTION FROM POWERPLANT ENGINEERING.;[03] PER MOC REPLACED #1 ENGINE FMU PER AMM 73-21-04. OPS/LEAK CHECK GOOD. REF BARCODE TTG8Q00WARMG FOR POWER ASSURANCE CHECK REQUESTED BY POWERPLANT ENGINEERING.