As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT LOST RT HYDRAULIC SYSTEM QUANTITY AND PRESSURE ON APPROACH TO SEA. ALTERNATE GEAR EXTENSION WAS USED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE HYDRAULIC SYSTEM PRESSURE LINE TO VENTRAL STAIRS LEAKING AT FITTING NEAR AFT PRESSURE BULKHEAD. THE HYDRAULIC LINE WAS REPLACED AND LEAK CHECK WAS GOOD.