AnQrKa
With regard to #3, why is KA's response "silly". The question asked by the C/list is "are the packs on or off". It serves as a reminder that the packs are on or off, who cares whether they are fed from Eng or APU!
Re Brakes the Co SOP's are to wait at least 5 mins after landing or coming onto stand before switching on the fans, unless brake brakes are going to exceed 500 degs or we're on a short turnaround.
Fx