As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#842, DUB-BOS. (ETOPS) CLASS II MSG FUEL ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM STATUS PAGE OF ECAM SYSTEM DISPLAY 1) FAULT(S) INDICATED BY FUEL. REMOVED & REPLACED FLSCU REF AMM 28-46-34-04 & PERFORMED FLSS BITE TEST REF AMM 28-46-00-740-001 & OPS CK GOOD. MX-4 UPDATED. MDDR CLEARED.