As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE HAS INCREASED DELTA EGT AND DECREASED EGT HOT DAY MARGIN. DELTA FUEL FLOW AND CORE SPEED REMAIN STABLE. GROUNDED - YES. REMOVED AND REPLACED MAIN ENGINE FUEL NOZZLES LT SIDE 16- 20, AND RT SIDE 1- 6 IAW MTX T/C PWRPL-73CMPT-01267-2 MAIN ENGINE FUEL NOZZLES - ON CONDITION REPLACEMENT. LEAK CK GOOD OPS CK GOOD NO FAULTS.