As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE AT FL 330, A SYSTEM HYDRAULIC PRESSURE DECREASED TO ZERO. FOLLOWED COM PROCEDURES AND DIVERTED TO DEN. FOUND LOWER RUDDER PCU TRANSFER VALVE LEAKING, REMOVED AND REPLACED IN ACCORDANCE WITH MM 22-11-31. INSPECTED A SYSTEM PRESSURE AND RETURN FILTERS. REMOVED AND REPLACED NUMBER 1 AND NUMBER 2 ENGINE HYDRAULIC PUMPS IN ACCORDANCE WITH MM 29-11-33.