As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - CREW REPORTED RIGHT HYDRAULIC SYSTEM QUANTITY LOSS DURING FLIGHT. ALTERNATE GEAR EXTENSION USED FOR LANDING. EMERGENCY DECLARED FLIGHT LANDED MCI WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RIGHT RUDDER SHUT-OFF VALVE THAT WAS LEAKING. SYSTEM GROUND CHECK NORMAL OPERATION.