As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4663 ON TAKE OFF CREW RECEIVED A BRAKE DEGRADE ON EICAS. CREW ABORTED TAKEOFF AND RETURNED TO BLOCK. AIRCRAFT REMOVED FROM SERVICE. TROUBLESHOT IAW FIM TASK 32-41-00-810-805A. REMOVED AND REPLACED ACU IAW AMM 32-41-02. OPERATION CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.