As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI, BRAKES REQUIRED 50-60 PERCENT ACTUATION ON PEDALS TO ENGAGE FOLLOWED BY BRAKE DEGRADED MESSAGE WHICH CLEARED. ON GATE RETURN, BRAKES COMPLETELY FAILED ABOVE 5 KTS. AND REQUIRED USE OF EMERGENCY BRAKE. MX R & R THE BRAKE CONTROL UNIT WITH TAXI AND OPS CHECKS SUCCESSFUL. ACFT WAS APPROVED FOR RETURN TO SERVICE.