As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING STATIC TAKEOFF, THE RT BRAKE FAILED MOMENTARILY AND A BRAKE DEGRADED EICAS MESSAGE APPEARED. THE CREW ABORTED TAKEOFF AND RETURNED TO THE GATE WITHOUT INCIDENT. MAINTENANCE REPLACED THE BRAKE CONTROL UNIT AND THE NR 4 WHEEL SPEED TRANSDUCER. OPS AND TAXI CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.