As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6384 - ROC-IAD - DURING TAXI HAD TO GET TOWED OFF OF THE RUNWAY DUE TO A TOTAL LOSS OF HYDRAULIC PRESSURE. AIRCRAFT WAS TOWED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED A CRACKED HYDRAULIC LINE, THE RIGHT NON RETURN VALVE AND THE BOTH HYDRAULIC PUMP DUE TO CAVITATION. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)