PPRuNe Forums - View Single Post - APU fuel purging vent push button
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Old 12th Sep 2021, 06:28
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ampclamp
 
Join Date: Jul 2008
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It's possible that it is used to run the fuel pump in the event of changing an APU or fuel lines to purge air or preservation fluids. I've not worked on a 320 for many years and don't have the manuals but I think it's along those lines.
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