As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLEXIBLE HYDRAULIC LINE TO THE RT MAIN GEAR IB DOOR ACTUATOR RUPTURED IN FLIGHT. CREW EXTENDED LANDING GEAR AND FLAPS USING THE AUXILIARY HYDRAULIC SYSTEM AND LANDED WITHOUT INCIDENT. DURING INSPECTION BY MAINTENANCE DEPARTMENT NO APPARENT CAUSE WAS DETERMINED FOR THE LINE FAILURE. MFG HAS BEEN ADVISED OF THE DEFECT. NEW HYDRAULIC LINE WAS INSTALLED, SYSTEM WAS SERVICED WITH FLUID AND BLED, AIRCRAFT WAS RETURNED TO SERVICE.