The question says it all. While reading I came across this that we can under no circumstances use APU bleed air for supplying wing anti ice? Any reason?
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On multiple PPRUNE threads they incorrectly say:
The APU bleed is much cooler than the engine bleed system, and would be ineffective for WAI.
But the reason is:
The APU bleed temperature is unregulated and thus could damage the wing slats if used for anti-ice.
Highlight shows regulation of engine bleed temperature.
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3$\begingroup$ Great thanks soo much. A lot of these questions arise in my mind due to they grey areas present in Airbus manuals. $\endgroup$– JaiAug 20, 2017 at 6:29