Originally Posted by
Aihkio
Just wondering:
The stall warning stick shaker and MCAS were a direct result from (badly) realised systems but they were kind of correct though based on bad data.
The UAS warning was (apparently) false but the primary data -pitot pressure- was correct. It was calculated to false with bad secondary data (AoA). Now if the comparison had been on pitot pressures no warning would have occured?
What is the opinion on showing one or the other?
repost
Very good point: If raw pitot pressure/speed matches within a defined tolerance seems that triggering a full UAS warning would not be necessary since it could (as it likely did) distract from the root cause, in this case one AOA sensor failing.
Perhaps an "uncorrected" warning with both displays reverting to raw speed, perhaps with an uncertainty band.
The difference being that UAS requires speeds to be treated as fully unreliable and not to be trusted.
Then again this might all just add another layer of complication for what should be an straightforward memory item.