What was found
EN ROUTE, NR 2 HYDRAULIC QUANTITY AND PRESSURE DROPPED TO ZERO WITH ASSOCIATED CAUTION LIGHTS. NR 1 HYDRAULIC QUANTITY DROPPED TO .5 QUARTS (PRESSURE ON NR 1 SYSTEM WAS NORMAL). PERFORMED EMERGENCY GEAR EXTENSION. LANDED WITHOUT INDICENT. MAINTENANCE REPLACED THE EXTRUDED AND LEAKING PRESSURE MANIFOLD O-RING. REPLACED CRACKED/LEAKING HARD LINE FROM PRESSURE MANIFOLD TO ENGINE SOFT LINE. ALSO, REPLACED HYDRAULIC PUMP AND PRESSURE MANIFOLD. PERFORMED LEAK CHECK, NO LEAKS NOTED.