What was found
ORD - FLT 1508 - EN ROUTE OKC/ORD DURING CRUISE, HYD SYSTEM 1 EXPERIENCED LOW QTY. ACCOMPLISHED ABNORMAL PROCEDURES AND AIRCRAFT PROCEEDED TO ORD. ACCOMPLISHED ALTERNATE GEAR AND FLAP EXTENSION AND AIRCRAFT LANDED ORD WITHOUT INCIDENT. REPLACED NR 2 ENGINE SYSTEM 1 ENGINE DRIVEN HYD PUMP. SERVICED HYD SYSTEM AND ACCOMPLISHED LEAK AND GROUND CHECK WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)