Re: A brief commentary

From: (Robert Dorsett)
Organization: Netcom Online Communications Services (408-241-9760 login: guest)
Date:         05 Aug 96 04:21:20 
References:   1 2 3
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In article <airliners.1996.1578@ohare.Chicago.COM> (Brian A. Reynolds) writes:
>>Aaah, but how do you know that your attitude indicator is not faulty?
>>What if the various attitude indicators on board also didn't agree?
>>See the problem? They have to identify which instruments they can
>It is also worth while to remember that FAR Part 25 requires a complete
>set of Standby Instruments which are totally independent of the
>'normal' displays.

I'm not sure of that, and, in fact, standby instrumentation on most aircraft
use pitot/static sources which are part of a common pitot/static system.
I.e., not "independent" in the sense that, say, two hydraulic systems are

See Peter Ladkin's web page for a description of the 757 pitot-static
system (don't have the URL handy, but I'm sure it can  found via