A-320 different FMA in capt and F/O PFDs?
Hi
I just read the issue 11 of Airbus Safety First magazine. In the Radio Altimeter Erroneous Values chapter, I got very surprised.
According to this, if the erroneus RA (capt RA reading -6 ft instead of 1400 ft) occurs during an ILS approach with both APs engaged (according to airbus SOPS) then the captain FMA goes to THR IDLE and FLARE, while the F/Os FMA remains in SPEED , G/S and LOC.
If I was better at computers I would insert the image here...
In the case of only AP 1 engaged, both FMAs would reflect the same (the wrong and dangerous one).
I thought that both FMAs are always "synchronised" and managed by the master FMGC. Apparently this is not the case in case of a AP 1 + 2 ILS. I can't understand why. Does it have to do with CAT III or something?