As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT AFTER TAKEOFF, WITH THE LANDING GEAR SELECTED DOWN, RECEIVED A BRAKE DEGRADED MESSAGE. THE AIRCRAFT RETURNED TO KMKE AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE BRAKE CONTROL UNIT. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.