What was found
(CAN) DURING FLIGHT ECAM CAUTION OF LOW GREEN HYDRAULIC LEVEL, BOTH ENGINE DRIVEN PUMPS SHUT-OFF AND AIRCRAFT PROCEEDED TO DESTINATION AS MOST VIABLE ALTERNATIVE. FOUND THE R/H ENGINE HYDRAULIC PUMP PRESSURE DAMPENER, LINE LOSS AND O-RING WAS DEFORMED AND EXTRUDED FROM ITS POSITION CAUSING THE HYDRAULIC LEAK. O-RING REPLACED AND LINE TIGHTENED,LEAK RUN CARRIED OUT, NO FURTHER LEAK NOTICED AIRCRAFT DISPATCHED FOR RETURNED FLIGHT.