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Old 6th Sep 2012, 00:00
  #292 (permalink)  
Peter H
Join Date: Jun 2008
Location: Cambridge UK
Posts: 129
I was trying to ask why the ECAM couldn't suggest the UAS procedure in a pitot failure.
Obviously it could suggest the UAS procedure. In hindsight it does look like a better option (to a non-pilot).

I suspect that it doesn't suggest the UAS procedure because nobody anticipated common mode pitot failures. Nor thought about their implications after they started to happen.

Personally I think that the warning could/should be given even earlier in the process, when the computer first recognised that a pitot failure may have occurred [*]. I think you might gain a few tens of seconds that way.

... during which time it might be a good idea if the pilots were encouraged to disengage the autopilot, until they can see that all is well. I doubt that autopilots should be relied on in situations where UAS may occur.

* I suspect that there is some intentional delay in the process. Not least to smooth over transient failures when the plane has just "flown through a puddle" and overloaded the pitots.
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