What was found
ON FLIGHT 4105 DURING CRUISE THE CREW REPORTED A LOW HYDRAULIC QUANTITY. THE CREW NOTICED A SIGNIFICANT DROP IN HYDRAULIC QUANTITY DURING FLIGHT. THE CREW ELECTED TO DIVERT TO CVG WITH QUANTITY ALMOST AT ZERO. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REPAIRED HYDRAULIC TUBE ELBOW PN 145-33601-433. THE LEAK AND PRESSURE CHECK WAS GOOD IAW EMB AMM 20-10-03. THE AIRCRAFT WAS RETURNED TO SERVICE.