As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENG FLUCTUATED LIKE A PULSING AT FL350 MACH .79. EPR 1.36-1.38 FP 203-209 N1 AND N2 +/- .1%. APPLIED ENG A/I WITH NO CHANGE. SWITCHED OFF BOTH EEC SWITCHES AND LEFT FLUCTUATED MORE FF 5820 TO 5960. REMOVED AND REPLACED FMU PER AMM 73-21-01. PERFORMED TEST NR 3 GRND TEST AT IDLE PWR. NO LEAKS OR DEFECTS NOTED. ALSO PERFORMED HIGH POWER ENG RUN. ALL PARAMETERS STEADY.