As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THEY RECEIVED A BRAKE OTBD INOPERATIVE CAUTION MSG WHEN THE LG WAS SELECTED DOWN. THE CREW DECLARED AN EMER. THE ACFT LANDED WITHOUT INCIDENT & SAFETY CREWS INSPECTED THE BRAKE & FOUND THE ACFT SAFE TO TAXI TO THE GATE UNDER ITS OWN POWER. MX REPLACED THE BRAKE CONTROL UNIT. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.