Hey Pif
No wuckin furries mate your English is fine - you should try out the English down here
Maybe I'm missing something here or there is something substantially different about the -200? Even on the -300's ENG BLEEDS ON is required in the shutdown C/L, but it doesn't prevent a subsequent start in the event of no AC being available as far as I know. Plus if you were doing a crossbleed start you would have the opposite Generator on bus so there's your AC source. Bear in mind the 737's (well at least the original generation) were designed and built with crappy aerodrome services in mind!
If you are doing a Battery Start (with APU bleed air, but no AC) then you won't be able to start ENG #2 first because the Isolation Valve will be closed (TRFR BUS #1 => AC) ... so start ENG #1 (recommended anyway). You will have bleed air to the #1 starter (APU Bleed Valve is on BAT BUS) and you can engage the starter (both Starter Valves are on BAT BUS) ... clean start, GEN #1 on bus, AC available, the Isolation Valve will open, start ENG #2 ... ya laughing
Or if you were starting with a GND cart for air you'd just have to start ENG #2 first (after the F/O hangs out the windows gesticulating wildly to the fool walking by the inlet face
) Okay, if for some screwed up twist of fate neither Generator would come online, the APU GEN is fritzed and the GND staff can't get the cart started coz somebody borrowed the battery and didn't bring it back ... well ... I wouldn't be laughing then
... but then ... we wouldn't be going anyway
A very learned ground instructor once told me that it is possible to get to the Isolation Valve and manually manipulate it, as ground engineers do on occasion. It's buried somewhere high up in the main gear well I think he said, but I've never had chance to find it - there's never enough time and it's always too noisy when I'm there
