A320 apu bleed on take off.
 

Say you take off with bleed on because of performance reasons.
Packs off was not a good option because you were in a high elevation airfield.
Already toga power.
Apu bleed fails.

Will the engine toga power reduce because it now supplies the packs?
Will it NOT supply the packs?

Just a random thought. Can't find the answer.

Thanks guys.

Hi. The answer is in FCTM.NO-040 P10/12

In case of APU auto shut down during takeoff, the

engine thrust is frozen till the thrust is manually reduced. The packs revert to engine bleed which

causes an increase of EGT to keep N1/EPR.