In article ,
(Robert M. Gary) wrote:
I think you are missing something. If both AIs start showing different
results you will be suspecious and start asking questions. As I noted
a realistic AI failure situation can be very difficult to detect.

How is this fundamentally different than if one AI disagrees with the DG
and turn coordinator? I try not to stare at the AI the entire time, and
it seems that a scan would pick up a discrepency regardless of whether
it included a second AI. Now, flying the plane with a second AI may be
easier once the failed AI is identified, but I don't see how a second AI
would make identifying the failure any easier, because it would be a
required scan item just like the DG and turn and bank.


JKG