Falcon Service Manual
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32
Disconnect the silicon tubes from the valves
Connect 2 closed loop tubes
Now repeat the pressure leakage test for the failed pressure channel. If the test fails again, then that
means that the valves are ok and the source of leakage is in the tubes or pumps. If the test passes ok, that
means that there is no leakage, and then the source of leakage has to be one of the 2 valves. Repeat the
test with only one valve connected, and then the other valve to isolate which valve is the cause of failure.
After identifying the leaking valve mark this valve clearly as the failed valve. This valve needs to be
replaced.
6.2 Pump/Tubes Investigation
If the Valve Investigation test shows that the problem lies with the pump or the tubes, then reconnect the
silicon tube ending to the 2 valves, and disconnect the silicon tube from the air exit of the pump that is
connected to the failed pressure channel. Connect an external manual pressure inflator to the
disconnected tube end, and repeat the pressure leakage test for this channel while manually inflating the
channel.
VS0152, rev 1.3 Page
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