As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 N1, N2 AND FUEL FLOW FLUXATIONS IN CLIMB AND CRUISE. N1 DEVIATED ROUGHLY 1 PERCENT AND FUEL FLOW ROUGHLY 100LBS FLUXATIONS WERE CONTINUOUS AND ASSOCIATED WITH YAW. REMOVED AND REPLACED FUEL CONTROL UNIT IAW AMM 73-21-01, PERFORMED OPS CHECK OF RT ENG FCU IAW AMM 73-21-01. A/C OK FOR SERVICE.