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737 Anti ice

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Old 7th May 2012, 14:56
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737 Anti ice

Quick Question,

If engine bleed air is selected off , can wing and eng anti ice still be used....??
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Old 7th May 2012, 15:34
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Eng TAI yes .
Wing TAI No
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Old 7th May 2012, 15:35
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Yes they can.

Engine Anti-ice is tapped off upstream of the bleed valve, and Wing Anti-ice can be fed from the opposite engine.

If both bleed valves are closed, however, then wing anti-ice is not available.
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Old 7th May 2012, 16:57
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But if ENG anti ice is tapped upstream on the bleed valve how can is still be used with Bleed valve selected off
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Old 7th May 2012, 17:54
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Because its not down stream of the valve!
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Old 7th May 2012, 18:12
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Please do not mix upstream and downstream.
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