As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED CENTER SYSTEM HYDRAULIC LOW QUANTITY LIGHT ON. TURNED OFF ALL CENTER HYDRAULIC PUMPS. FLIGHT DIVERTED, DECLARED AN EMERGENCY, LANDED WITHOUT INCIDENT. ON INSPECTION FOUND LEAK AT DELTA P FITTING ON CENTER SYSTEM CASE DRAIN FILTER MODULE. O-RING REPLACED LEAK CHECKED OK.