As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT ON GEAR EXTENSION, RECEIVED A BRAKE DEGRADED MESSAGE ON THE EICAS DISPLAY. DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. MX REPLACED THE RT BRAKE CONTROL VALVE. OPS CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.