737 Anti ice

[Boeing Europe]

Quick Question,

If engine bleed air is selected off , can wing and eng anti ice still be used....??

[BUGS/BEARINGS/BOXES]

Eng TAI yes .
Wing TAI No

[Pub User]

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.

[Boeing Europe]

But if ENG anti ice is tapped upstream on the bleed valve how can is still be used with Bleed valve selected off

[Lord Spandex Masher]

Because its not down stream of the valve!

[IFixPlanes]

Please do not mix upstream and downstream.