Hi,
Why were not the same criteria as applied to the fbw computers applied to the air-data system?
Simply, because (it seems) there are no solutions yet available (sensors) to have the (could provide)
required redundancy.
In an earlier post you could find patents filed by Airbus SAS on sensors (laser based).
We heard about another solution being prepared for short time UAS. A Software based "hysteresis like" band-aid.