As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#8123, JFK-LAX. (ETOPS) ' ENG 2 FIRE LOOP B FAULT INTERMITTENTLY ( ENGINE FIRE DETECTION SYSTEMS 2) LOOP B ); R/R 4001WD2 CORE LOOP AS PER TSM 26-12-00-810-806A AS WELL AS TERMINAL BLOCK 450VT2 BLOCK 5. REF TRAX FOR SPECIFIED WIRE CHECKS/ LOOP CHECKS. OPS TEST OK AT THIS TIME/ REF ESPM 20-44-51 FOR BLOCK REMOVAL AND REPLACEMENT. REF LOGPAGE 3820815, ITEM 2 FOR FURTHER T/S. THESE ITEMS CLEAR THIS MDDR. MX-4 UPDATED. PLACARD REMOVED. '