As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1124, LAX-JFK. (ETOPS) 'ENG 2 FIRE LOOP B FAULT ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ); PERFORMED TSM 26-12-00-810-802-A FOUND FDU#2 AT FAULT. REMOVED AND REPLACED FDU #2 IAW AMM 26-13-34. THE OPS CHECK IS GOOD. MDDR CLEARED. MX-4 UPDATED. PLACARD REMOVED.