As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1621, LHR-BOS. (ETOPS) 'AIR BLEED CLASS 2 MSG ( CLASS II MAINTENANCE MESSAGES DISPLAYED ON ECAM STATUS PAGE OF ECAM SYSTEM DISPLAY 1) FAULT(S) INDICATED BY AIR BLEED ); REF TSM TASK 36-00-00-810-804-A, PERFORMED BITE TEST OF EBAS REF AMM 36-11-00. OPS TEST OK. NO FAULTS NOTED. NO FAULTS DETECTED ON GROUND REPORT OR TSD. MDDR CLEARED. MX-4 UPDATED. PLACARD REMOVED.