nycbusdriver
Veteran
I never said the packs overheat, I said the start carts can, and that the start cart is what's lost power for engine start. In regards to the amount of equipment, most airports (in my experience) have PC Air connections on the jetways. It's far easier to roll up a hose then pack the hose into an AC cart, then navigate it away from the aircraft. By using air available on the jetways you don't heat up the start cart and don't need an AC cart as well, thus eliminating a piece of equipment. As you said, in many cases getting air from a start cart (I really don't understand how this part works, though you've kind of confirmed my suspicions) often either isn't compatible or is just plain inadequate.
R-E-A-D C-A-R-E-F-U-L-L-Y.
I never said the packs overheat, either.
Go learn to fly, get yourself a type rating in a transport category aircraft, then get back to us.
Until then, stop embarrassing yourself with your lack of knowledge about how this stuff works.