What was found
MKE - FLT 2745 - ABOUT 15 MINUTES OUT FROM MKE, THE B-HYDRAULIC SYSTEM LOST PRESSURE AND A-HYDRAULIC SYSTEM QUANTITY DROPPED TO 1.25 GALLONS. THE LOW PRESS AND LOW QTY LIGHTS ILLUMINATED. CAPTAIN TURNED OFF B-PUMPS WITHIN 15 SECONDS OF LOW PRESS LIGHTS ILLUMINATING. CAPTAIN DECLARED AN EMERGENCY AND MADE A NORMAL LANDING AT MKE. AIRCRAFT TAXIED TO THE GATE UNDER ITS OWN POWER. MAINT FOUND A SEAL ON THE B-SYSTEM AILERON POWER CONTROL UNIT BAD. REMOVED AND REPLACED AILERON POWER CONTROL UNIT (PN 65-44761-17) IN ASSOCIATION WITH MM 27-11-71. INSPECTED ALL HYD FILTERS FOR CONTAMINANTS. NO CONTAMINANTS FOUND. REPLACED FILTERS. SERVICED AIRCRAFT HYD SYSTEMS. OPERATIONAL CHECK AND LEAK CHECK GOOD. (X)