As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED THAT AFTER TAKING POSITION ON THE RUNWAY, RECIEVING A BRAKE SYSTEM 1 FAULT, RETURNED TO THE GATE. MAINTENANCE PERFORMED A BITE CHECK OF THE NR 1 AND 2 BRAKE STEERING CONTROL UNIT (BSCU) IAW AMM 32-46-00 WITH NO FAULTS BEING NOTED. ALL FAULT MESSAGES CLEARED AND THE AIRCRAFT WAS OK FOR SERVICE.