As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE, FL350, CENTER HYDRAULIC QUANTITY EICAS WARNING ILLUMINATED. HYDRAULIC QUANTITY ON STATUS PAGE INDICATED IT WAS 0.40. CENTER HYDRAULIC PUMPS WERE SHUTDOWN FOR REMAINDER OF FLIGHT. YVR ATC ADVISED AND AN EMERGENCY WAS DECLARED. LANDED AT YVR WITHOUT INCIDENT. HYDRAULIC LEAK DETECTED AT LT CENTER ELEVATOR PCA. REPLACED LT CENTER PCA, SYSTEM CHECKED SERVICEABLE.