Gents...
I'm trying to map out some CB locations for various 744 configurations, but I'm missing a few details.
The British Airways Wiring Schematics, ref SSM 24-54-07, list two different CB's at the same location on P6 (grid J-18)
"ENG START AIR CONT(C395)" & "AC STBY PWR-TEST-APU BAT (C10572)".
The latter relates to Standby EFIS switching (found on airlines such as Singapore and British Airways)
This conflict is partially resolved as RR-powered 744's don't have "ENG START AIR CONT" CB's (
AFAIK, it's a GE and PW thing), but this doesn't necessarily mean that British has the "AC STBY PWR-TEST-APU-BAT" CB at grid J-18. Some airlines (e.g. Singapore Airlines should have both CB's because they have P&W and Standby EFIS switches). Unfortunately, I haven't worked on SQ or BA for a while, so I can't check this out for myself.
Thanks for any insight.
Cheers.
NSEU