500
4 systems the ports machine operates on.
What is total 19 systems LFE, FLOW METER, VACUUM, SUPPLY NITROGEN, HIGH PRESSURE, STEP DOWN PRESSURE, LOW PRESSURE, PRESSURE LEAK CONTROL, RELIEF FLOW, 20 PIS, ANTI-G, ALTITUDE CONTROL/MAKE UP FLOW, AUXILIARY FLOW, OUTLET FLOW, ELECTRICAL, CONNECTING CABLES, CONTROLLERS.