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Old 10-02-2020, 10:11 AM   #10
Gilles
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Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,850
KB944

Please note that I am in not in any way an expert on AC systems..

However, we happen to sell PCA Systems (AC ground support systems) for aircraft, and I know that for an AC system to work properly there has to be a difference between the Hi pressure and Low pressure systems to allow the heat exchange process to occur.

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