As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SELECTING GEAR DOWN, CREW RECEIVED A RT BRAKE FAIL AND LT BRAKE FAIL MESSAGES. RAN QRH AND AS A PRECAUTION DECLARED AN EMERGENCY. LANDED AND TAXIED TO GATE WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND BRAKE SHUTOFF VALVE HAD FAILED. MAINTENANCE R & R BRAKE SHUTOFF VALVE IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.