What was found
(CAN) ACFT SUSTAINED A LEAK IN THE YELLOW HYD SYSTEM. DUE TO LOW LEVEL OF HYD FLUID, CREW SHUTDOWN PUMP RENDERING YELLOW HYD SYSTEM UNSERVICEABLE. CRF WAS REQUESTED FOR LANDING, FLIGHT DID NOT DECLARE AN EMERGENCY. YELLOW HP MANIFOLD CHECK VALVE LEAKING, CHECK VALVE, 3058GM REPLACED IAW 29-13-14-400-001-A. NO FURTHER LEAKS, FLUID ADDED TO CORRECT QTY.