hmm i don't fly the 73
It is so that both engines make the same power, if you had one engine supplying a pack it would produce slightly less power than the engine that was "bleed off".
But i thought that was taken care by step no:4
For increased air flow when flaps are extended (takeoff and landing) use APU to supply bleed air to the operating pack
I don't have access to mel on the A320, does anyone know if taking off with 1 inop pack requires bleeds off too?
Many thanks.