As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENG FIRE LOOP "A" INOP. GROUNDED - YES. REF B737-800 FIM 26-10 TASK 801 FOUND LOOP A ENG #1 LOW DETECTOR RESISTANCE FAULT. TESTED LOOP IN FLIGHT DECK AND BITE TEST ON BOX NO FAULTS FOUND. PERFORMED WIRE CHECK REF B737-800 WDM 26-11-11 ALL WITHIN LIMITS. PERFORMED CLEANING REF FIM 26-10 TASK 810. ETOPS GROUND VERIFICATION COMPLETE.