What was found
JFK - FLT NR 1072 - EN ROUTE YYZ/JFK - DURING CRUISE, LOST SYSTEM 1 HYDRAULIC QUANTITY WITH PRESSURE DROPPING TO 500 PSI AND QUANTITY AT 35. SYSTEM 2 PRESSURE AND QUANTITY NORMAL. ACCOMPLISHED QRH PROCEDURES FOR NR 1 HYDRAULIC SYSTEM AND AIRCRAFT PROCEEDED TO JFK. ACCOMPLISHED ALTERNATE LANDING GEAR EXTENSION AND ALTERNATE FLAP EXTENSION AND AIRCRAFT LANDED JFK WITHOUT INCIDENT. REPLACED NR 1 ENGINE HYDRAULIC PUMP AND SERVICED SYSTEM. ACCOMPLISHED LEAK AND GROUND CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)