What was found
ORD - FLT 393 - EN ROUTE DTW-ORD - DURING CRUISE, SYS A HYDRAULIC QTY WENT TO LESS THAN ONE-QUARTER GALLON WITH NO LOW LEVEL INDICATION. SYSTEM A HYDRAULIC PRESSURE FLUCTUATED. ACCOMP ABNORMAL PROCEDURE FOR LOSS OF SYSTEM A HYDRAULIC FOLLOWED BY NR 2 ENG HYDRAULIC PUMP LOW PRESSURE LIGHT ILLUMINATING. A/C PROCEEDED TO ORD AND LANDED W/O INCIDENT. REPLACED OUTBOARD FLAP DRIVE MOTOR FOUND LEAKING. ALSO, REPLACED BOTH ENGINE DRIVEN HYDRAULIC PUMPS AND CASE DRAIN FILTERS ON NR 2 ENGINE. ACCOMPLISHED LEAK AND GROUND CHECK WITH NO DEFECTS FOUND. ACCOMPLISHED GROUND ENGINE RUN AND CHECK OF LOW PRESSURE LIGHT OPERATION WITH NO DEFECTS FOUND. SYSTEM GROUND CHECKED NORM OPS. (M)