744 Circuit Breaker Panels (BA&SQ)
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744 Circuit Breaker Panels (BA&SQ)
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
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
Last edited by NSEU; 20th Jul 2009 at 00:16.
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As the BA a/c arrived in 'batches' there are some differences in C.B locations. just to complicate matters there are also some errors in the AMM for C.B locations as well!
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Thanks, Gas Path.
That's true. I've noticed that myself. The Wiring Diagram Manuals seem to be the most reliable (and they put the "AC STBY PWR-TEST-APU-BAT" CB at J18).
Hopefully someone can tell me where SQ puts theirs.
Cheers.
Ian.
just to complicate matters there are also some errors in the AMM for C.B locations as well!
Hopefully someone can tell me where SQ puts theirs.
Cheers.
Ian.
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RR have START/IGN CONT cb on p6
.. and I have no idea where I'm going to get information on exotic beasts such as ERF's.
Last edited by NSEU; 23rd Jul 2009 at 00:00.
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J-18 is ENG START AIR CONTROL
BA has theirs at J-18.
Curiouser and curiouser.
Thanks.
Cheers.
NSEU
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errors in Manuals ...
NSEU-IAN,
As per my experience , both Airbus and Boeing manuals in general get mistakes ...("errare humanum est").
Moreover , all a/c are modified until their "end" of ops , i mean that some can be modified and some not and some can have different options.
Thats the reason why , i always check the effectivity first.
Thats the reason why , you usually find an adress from the manufacturer at the beginning of the manuals for any comments.
(who said that the manuals were "the Bible" ?).
Cheers.
As per my experience , both Airbus and Boeing manuals in general get mistakes ...("errare humanum est").
Moreover , all a/c are modified until their "end" of ops , i mean that some can be modified and some not and some can have different options.
Thats the reason why , i always check the effectivity first.
Thats the reason why , you usually find an adress from the manufacturer at the beginning of the manuals for any comments.
(who said that the manuals were "the Bible" ?).
Cheers.
