mark.bitterlich(at)navy.m
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 Posted: Thu Oct 09, 2014 8:55 am Post subject: Emergency Air (Or Lack Of) |
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Two methods come to mind. One is the "find it" approach using an Ultrasonic Leak Detector. They work. Google. But you need a nice quiet hangar, and ..... diligence/patience (hard for me too, I like instant results!).
Second, since you are competent in the design of the air system on the 52, and since it leaks this quickly, you can try to narrow down where it is happening. There are two ways to go about this. You will need some compressed air or nitrogen, which I am assuming you have access to. Start by simply disconnecting one of the air-lines going downstream from the bottle. Disconnect a line and cap it. See if you have bleed-down. If not, reconnect and go downstream further. You get the idea. For example, when you come to the one way check valve leading to the external air connection, just disconnect the line before the one way check valve and cap it. See if you have leak-down. This at least gets you into the ball-park of where the leak is.
The second method is to reverse engineer the leak. I am lucky enough to have a high pressure portable compressed air bottle with a regulator. Using something like this you can pressurize whatever part of the system you want, and look for leaks ... same method as above really (just in reverse) and a truly great method for finding leaks in compressors, banjo fittings, snot valves, etc. I understand that is NOT your problem at this time, just mentioning it for future reference.
Mark
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