As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - CREW REPORTED DURING CLIMBOUT, CENTER HYDRAULIC SYSTEM PRESSURE EICAS MESSAGE AND LIGHT. EMERGENCY DECLARED FLIGHT RETURNED LAX LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NUMBER NINE SPOILER ACTUATOR. SYSTEM GROUND CHECK NORMAL OPERATION.