Hmmm ...
... Kinda defies the logic of a battery start doesn't it?
That's gotta be something queer with the -200's then coz on my system schematic for the -300/500's the Starter Valve off-take is downstream of the Engine Bleed Valves. Mr Boeing sure screwed that up then if yours is the case.
I don't envy you then, stickin' to my -300 till something better comes along
May all your starts be AC
