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De Icing Proc while HYD system is depressurized.
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8th Feb 2021, 08:49
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TURIN
Join Date: Feb 2002
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It used to be a requirement to position the 737 stab LE up before deicing to allow any fluid to drain from the elevator/stab hinge line void area. That is the only reason I know of hydraulics on before deicing.
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