Originally Posted by
pineteam
Hello everyone,
In the FCOM-PRO-NOR-SOP-04- AIR CON it says:
No doubt about the HP unit, but what about the LP unit connected with APU Bleed ON and packs OFF? Should not be an issue isn't it? Since the LP is connected downstream of the packs.
No bleed No coffee!
Thank you.
PRO NOR SOP assumes that after You will clear the white lights, ie turning the packs on. The actual limitation is from LIM-AIR : The flight crew must not use conditioned air from the packs and from the LP Air Conditioning Unit at the same time, to prevent any adverse effect on the Air Conditioning system.