As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"FAULT" LIGHT ON ENGINE FIRE PANEL ON ALMOST CONTINUOUSLY FROM ROTATION TO RETURN TO SFO. PER MAINT CONTROL TRIED ALL DIFFERENT POSSIBLE COMBINATIONS OF DESELECTING FIRE LOOPS FOR BOTH ENGINES. NO CHANGE IN INDICATION. FAULT LIGHT WAS ON LESS AT LOWER POWER SETTINGS, BUT STILL ON MOST OF TIME. FOUND NR 1 ENG AT FAULT. REPLACED A-CORE LOOP HARNESS AND REPLACED B-CORE LOOP TERMINAL END AT 11 O'CLOCK POS SYS CKS GOOD PER TASK 26-10-00-810-801.