As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1210 DFW-PHL- BRAKES - ACFT RETURNED TO GATE WITH ECAM MESSAGE "AUTO BRAKE INOP" FOLLOWED BY NORMAL BRAKE SYSTEM 1 FAILURE. ATTEMPTED RESETS WITH NO CHANGE IN INDICATION. MAINTENANCE REMOVED AND REPLACED THE BRAKE/STEERING CONTROL UNIT AND BRAKE SELECTOR VALVE. BRAKE SELECTOR VALVE WAS A CONFIRMED FAILURE. BRAKE/STEERING CONTROL UNIT WAS NO FAULT FOUND.