As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6610 - ORF-IAD - DURING TAXI, AIRCRAFT RETURNED TO GATE DUE TO NORMAL BRAKE PRESSURE WOULD NOT STOP AIRCRAFT. MAINTENANCE INSPECTED AND FOUND MAIN BRAKE ACCUMULATOR LOW. MAINTENANCE SERVICED BRAKE SYSTEM, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)