As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 288, LAX-BOS. (ETOPS) ENGINE FIRE DETECTION SYSTEMS 1, LOOP A, IAW TSM 26-12-00-810-857-A. FOUND CRACK ON ENG NR 2 FIRE LOOP A, CORE. FIN 4001WD1. THE OPS CHECK IS GOOD NO FAULTS AT THIS TIME. REMOVED AND REPLACED LOOP A ON NR 2 ENGINE CORE. . PLACARD REMOVED. REF AMM 26-12-17-400-803-A. ORIG SUBMISSION DATE: 12/19/2022