As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SLAT RETRACTION, THE RIGHT HYDRAULIC SYSTEM DROPPED TO ZERO QUANTITY AND PRESSURE. CREW DECLARED A YELLOW EMERGENCY AND FLIGHT WAS RETURNED TO MCI. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND HYDRAULIC LINE LEAKING AT LEFT WING FORWARD SPAR. INSTALLED TEMPORARY LINE. AIRCRAFT RETURNED TO SERVICE.