As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4004 THE CREW REPORTED THAT AFTER LANDING, INITIAL APPLICATION OF BRAKES GAVE NO BRAKING ACTION ALONG WITH A BRAKE DEGRADE CAUTION ON EICAS. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED BRAKE CONTROL UNIT IAW AMM# 32-41-02. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.