As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCOMPLISHMENT OF TC 78273000, THE FOLLOWING FAULT DISPLAYED FOR NR 2 ENGINE. MSG NR 77-20862. BOTTOM LEFT EGT SIGNAL IS OUT OF RANGE (T495S3). FLT LEG 1 AND 2. FAULT TIME IS ECONOMIC. ACFT GROUNDED. ENGINE SHOWS NO FAULTS OR FAULT HISTORY. BITE TEST DONE REF B737-800 AMM 73-21-00-700-804-F00 WITH NO FAULTS. T49.5 PROBES ARE ALL WITHIN TOLERANCE OF EACH OTHER. GROUND VERIFICATION SUCCESSFUL.