As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5360, STL TO RIC. THE CREW REPORTED A HYDRAULIC SYSTEM 1 FAILURE IN FLIGHT AND DIVERTED TO IND WHERE THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND A CRACKED O-RING ON THE LEFT-HAND AILERON MANIFOLD CAUSING THE HYDRAULIC LEAK. THE AILERON MANIFOLD WAS REPLACED AND THE HYDRAULIC SYSTEM LEAK CHECKED GOOD.