or two forward 115 VAC ground power sources
Yeah, this is the big question. I have found more info on the internet. The engines have 2ea 250kva generators/starters to operate systems (packs (big draw)). It has been stated that 2 90kva GPU's will spin those engines up to max motor, I can smell the isulation melting off the chords just thinking about it.
Now with 1000 kva, can 180kva supplied by 2 generators operate the (was going to say "ACM's") but suppose EACM's at the gate??