As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE TREND DATA SHOWS AN INCREASE IN CRUISE DELTA EGT ALONG WITH A DECREASE IN TAKEOFF EGT HOT DAY MARGIN. NR 2 ENGINE S/N 894227. ALL OTHER PARAMETERS ARE STABLE. INDICATION ERRORS ARE SUSPECT. ACCOMPLISHED FMC CDU FAULT TASKCARD NO FAULTS NOTED. ACCOMPLISHED EGT INDICATING CLEANING IAW MMS77 21 00. ACCOMPLISHED EEC TEST, NO FAULTS FOUND.