As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2220, LHR-JFK. (ETOPS) .'ENG #1 FIRE LOOP A FAULT; REMOVED AND REPLACED #1 ENG AGB LOOP A IAW AMM 26-12-17 REF L/PG 4299780, ITEM 1 (REMOVED AND REPLACED#1 ENG LOOP A AFT CORE IAW AMM 26-12-17. OPS CHECK GOOD) FOR REPLACEMENT OF #1 ENG AFT CORE LOOP A IAW AMM 26-12-17. REMOVED AND REPLACED #1 ENG LOOP A ELECTRICAL HARNESS 4165KS IAW AMM 26-12-61. OPS CHECK GOOD.'