As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#32, AMS-BOS. '(ETOPS) ' ENG 2 FIRE LOOP B FAULT ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ); (RESOLVED ON W/O: 1406593 TASKCARD: NR-00001 ) REMOVED AND REPLACED FDU PER TECH SUPPORT IAW AMM 26-12-34. OPS CHECK NORMAL WITH NO FAULTS THIS ACTION CLEARS MDDR 579863 MX 4 UPDATED PLACARD REMOVED MCC NOTIFIED.