PPRuNe Forums - View Single Post - 737NG Air cart/normal vs Crossbleed
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Old 24th Feb 2014, 17:48
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ant1
 
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AFAIK, no exeption here: Open is the position in which you will find the isolation valve on the NG, on the ground, it's part of the shutdown and preflight procedure. Can't believe I'm writing this.
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