As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW ABORTED TAKEOFF DUE TO A BRAKE OUTBOARD INOP EICAS MESSAGE. CONTRACT MX FOUND LOOSE CONNECTORS ON BOTH OUTBOARD BRAKES. THE CONNECTORS WERE CHECKED FOR CONDITION AND CLEANED WITH NO DEFECTS NOTED. A TAXI AND OPERATIONAL CHECK WERE PERFORMED WITH NO FAULTS DISPLAYED.