As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2288, JFK-AMS. (ETOPS) 'ENG 1 LOOP A FAULT ( ENGINE FIRE DETECTION SYSTEMS 1) LOOP A ); REF LOGPAGE 4065393, ITEM 2 (REF TSM 26-12-00-810-808-A. FOUND ENG #1 CORE AGB LOOP A SHORTED ON DETECTOR TERMINAL A/C TO OUTER CASE. REMOVED AND REPLACED AGB LOOP A IAW AMM 26-12-17. OPS CHECK GOOD. NO FAULTS PRESENT. MEL REMAINS OPEN TO MONITOR IF FAULT RETURNS.) REMOVED AND REPLACED AGB FIRE LOOP OPS CHECK OK. FAULT HASN'T RETURNED SINCE R+R DATED 02-03-25.