As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 817 FROM KMCO TO RATL AFTER TAKEOFF A LOSS OF HYDRAULICS OCCURED. RAN LOSS OF HYDRAULIC EMERGENCY CHECK LIST. DUE TO INTENDED FLIGHT PLAN, CREW ELECTED TO RETURN TO DEPARTURE STATION KMCO AND LANDED WITHOUT INCIDENT. FOUND RIGHT AILERON CYLINDER SWIVEL O-RING BLOWN. REMOVED AND REPLACED O-RINGS, OPS AND LEAK CHECK WERE GOOD. SERVICED HYDRAULIC SYSTEM. THIS WORK WAS PERFORMED PER ALL APPLICABLE MANUALS AND AIRCRAFT WAS RETURNED TO SERVICE.