Originally Posted by
RR_NDB
This is feasible, should be done long time ago and the approach used by Airbus SAS showed in the earlier mentioned paper from the Design group is IMHO an ERROR.
It was what could be achieved with the technology of the day,
To diagnose UAS just by "System output" is DANGEROUS and a good example of K.I.C.S. (*)
The System provided a lot of information including processed garbage.
Where do you see evidence of this? I must confess I can't. The idea that conflicting information was presented to the crew is in complete opposition to the recorded and proven reference to missing speed data by the PNF at 02:10:15.
A good man-machine interface could provide to 100% of the crew (including Capt) reliable information.
To be fair I'm not the only one who isn't sold on your magic DSP theory.#
Remember that when the Captain returned, the airspeed was back online, so he was facing a different set of problems than the initial situation confronting the F/Os.
For what it's worth I think that the initial UAS problem was quickly overtaken by the concern over the aircraft attitude caused by the PF's control inputs as far as the PNF and Captain were concerned.