As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - DURING FLIGHT THE FLIGHT CONTROL HYDRAULIC QUANTITY DROPPED TO ZERO. LANDING AT SEA WAS UNEVENTFUL. MAINTENANCE INSPECTED THE AIRCRAFT AND SERVICED THE FLIGHT CONTROL HYDRAULIC SYSTEM TO FULL. THE SYSTEM WAS PRESSURIZED FOR 45 MINUTES WITH NO LEAKS OR MIGRATION NOTED. THE # 1 HYDRAULIC SYSTEM ACCUMULATOR WAS ALSO SERVICED. THE AIRCRAFT WAS RETURNED TO SERVICE.