As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT HYDRAULIC QUANTITY DECREASED TO 4 QTS IN FLIGHT WITH AMBER WARNING LIGHT ON INDICATOR. PROCEDURES FOLLOWED AND SYSTEM TURNED OFF UNTIL PRIOR TO LANDING. AFTER LANDING RIGHT QUANTITY INDICATED 2 QTS WITH NORMAL PRESSURE. FOUND PRESSURE LINE TO RUDDER POWER PACK LEAKING AT UNION. REPLACED O-RING, SERVICED RT SYSTEM AND LEAK OPS CHECK OK.