As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENG LOOP A OVHT/FIRE SHOWS FAULT. GROUNDED - YES. REMOVED AND REPLACED NR 2 ENG FIRE DETECTOR ASSY M1757 AND M1758 PER AMM 26-11-01/401. REMOVED AND REPLACED NR 2 ENG CORE FIRE DETECTION HARNESS MW0325 PER AMM 26-11-02/401. VERIFIED NR 2 ENG FIRE DETECTION SYS OPS TESTED NORMAL PER AMM TASK 26-11-00-710-801.