As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#523, JFK-LAX. (ETOPS) CLASS II MX MESSAGE AIR BLEED ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM STATUS PAGE OF ECAM SYSTEM DISPLAY 1) FAULT(S) INDICATED BY AIR BLEED ); REMOVED AND REPLACED 2 ENG DELTA PSI SENSOR IAW AMM 36-11-18. MX-4 UPDATED MDDR CLEAR.