What was found
PHX- AIR TURNBACK- FLT 0663- ON DEPARTURE OUT OF PHOENIX EN ROUTE TO SNA, THE REPORT BY THE PILOT STATED THAT A LOSS OF -B- SYSTEM HYDRAULICS HAD OCCURRED AND THAT THE AIRCRAFT WAS RETURNING TO PHOENIX. MAINTENANCE INSPECTED THE HYDRAULIC SYSTEM AND FOUND THE GROUND SERVICING PRESS MODULE QUICK DISCONNECT STUCK OPEN. MAINTENANCE PROCEEDED TO REMOVE AND REPLACE THE QUICK DISCONNECT FITTING, SERVICED HYDRAULICS, BLED SYSTEM LEAK AND OPERATIONAL TESTS WERE SUCCESSFUL.