As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O AND GEAR RETRACTION, CREW NOTICED HYDRAULIC QUANTITY LOW. CREW MONITORED HYDRAULIC LEVEL FOR DURATION OF FLIGHT WITH NO CHANGE. UPON GEAR EXTENSION, HYDRAULIC QUANTITY DROPPED FURTHER, REQUIRING THE A/C TO BE TOWED TO RAMP FROM THE ACTIVE TAXIWAY. MAINTENANCE DISCOVERED THE RT MLG DOOR SEQUENCE VALVE HAD CRACKED. THE VALVE WAS REPLACED.