As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD CREW REPORTED RT HYDRAULIC PRESSURE LOSS. EMERGENCY DECLARED FLIGHT LANDED ORD WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE REPLACED HYDRAULIC TRANSFER CYLINDER THAT WAS LEAKING. SYSTEM GROUND CHECKED NORMAL. OPERATION (CLOSED).