As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF WE RECEIVED A LT OTBD BRAKE FAIL MESSAGE. THIS WAS FOLLOWED SHORTLY BY A R OTBD BRAKE FAIL MESSAGE. ABORTED. THE MESSAGES CAME ON AND OFF INTERMITTANTLY AFTER THAT. B3 CODES ARE AS FOLLOWS: B3-007830 AND B3-007107. REPLACED BRAKE CONTROL VALVE. OPS CHECK GOOD. IAW AMM 32-43-09.