As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INTERROGATION THE FMC CDU FOR ENGINE FAULTS, FOUND MAINT FAULT CODE 77-20862, BOTTOM LT EGT SIGNAL IS OUT OF RANGE. THIS IS A ECONOMIC FAULT. ACFT GROUNDED. NR 1 ENGINE SHOWS NO CURRENT OR HISTORICAL FAULTS. FOUND NR 2 ENGINE CODE 77-20862, BOTTOM LT EGT SIGNAL IS OUT OF RANGE. ACCOMPLISHED EGT INDICATION SYSTEM CONNECTOR CLEANING IAW AMM 77-21-00-140-801.