As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#778, LAS-BOS. (ETOPS). CLASS 2 AIR BLEED MSG ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM STATUS PAGE OF ECAM SYSTEM DISPLAY 1) FAULT(S) INDICATED BY AIR BLEED ); RESET AC POWER IAW 24-21-00 MESSAGE CLEARS MX4 UPDATED PLACARD REMOVED