As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STL - CREW REPORTED AFTER TAKEOFF RIGHT HYDRAULIC QUANTITY WENT TO ZERO. EMERGENCY DECLARED FLIGHT RETURNED STL LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RIGHT ENGINE DRIVEN PUMP CASE DRAIN FILTER DELTA P INDICATOR. SYSTEM GROUND CHECK NORMAL OPERATION.