As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6200 - IAD-ROA - DURING TAXI, RETURNED TO GATE DUE TO LOST OF HYDRAULICS AND BRAKES ON TAXIWAY. MAINTENANCE INSPECTED AND FOUND HYDRAULIC LINE LEAKING AND REMOVED AND REPLACED LINE. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)