PPRuNe Forums - View Single Post - De Icing Proc while HYD system is depressurized.
Old 8th February 2021 | 08:49
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TURIN
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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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