As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINT FERRY FLIGHT AFTER RUDDER CHANGE, AIRCRAFT LOST A-SYSTEM HYDRAULICS. AIRCRAFT RETURNED TO PAE AND MADE AN UNEVENTFUL LANDING. INSPECTED AND FOUND A-SYSTEM SHUTTLE VALVE LEAKING. REPLACED AND SERVICED SYSTEM PER BOEING M/M.