Far be it for me to post in such a furious thread, but I can't help noticing that some people may be confusing the radio altimeter status.
A failure of RA channel 1 made the a/c go to power flight idle.
amongst others...
Would you not agree that it either gives a reading or doesn't (ie. online or fail)?
the fact that it gave a false reading does not mean that it had failed (in logic terms).
In the case of a false reading, how does the AT know that it is false? It doesnt, I presume.
In the event of a FAILURE of the radio altimeter certain conditions / configurations would not be allowed to exist, but as this wasn't a FAILURE, things carried on as 'normal' based on the (extraneous) data.
Sorry for interrupting....