Originally Posted by
aa73
We (AA) have that procedure in our OM as a better way to cool the airplane when taxiing. Eng bleeds off, APU bleed on, packs on Auto (no need to go to High, they automatically go to high anytime on the ground with the eng bleeds off and the apu bleed on.) Standard procedure for summertime taxiing, esp in DFW and PHX.
True. But if you put the packs in high on the ground with the APU bleed on, you get
APU high flow rate. (yes. It's a thing) AND Placing the pack switches in high turns off the left recirc fan. It's in our FM. Not as a proceedure, but as an air conditioning description. And yes, it works great.
There is nothing in our books that disallows this procedure.