As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLT 8641 - EN ROUTE SYR TO LAS, CREW NOTED LOSS IN SYSTEM 'A' HYDRAULIC QUANTITY. CAPTAIN ELECTED TO DIVERT TO DEN. FLIGHT LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND THE REDUCER FITTING ON THE HYDRAULIC TRANSFER VALVE LEAKING AND REPLACED IT. (X)