Originally Posted by rrr
A320 FCOM OP-020, Flight Controls, Alternate Law
In low speed (at a speed threshold that is below VLS), the automatic pitch trim stops and natural longitudinal static stability is restored, with a stall warning at 1.03 VS1G.
In these conditions, the automatic pitch trim operation would also stop on the 330 in ALT1, but not in ALT2 with failure of 2 ADRs.
Don't you have that ALT distinction on the 320 ?
Originally Posted by Bpalmer
AF447 did not reach an unusual attitude at any point. The only parameter that could have triggered the unusual attitude law would have been the 45° AOA.
Speed below 60kt in another one.
Originally Posted by BOAC
It appears that we can no longer expect pilots to monitor airspeed (where available) nor to monitor aircraft attitude, so something surely needs to stop HAL or whatever we choose to call the system from trimming to absurdity. Again, a 'stop' at a sensible limit with a 'conscious' over-ride option for when the horses in the hold break loose would do it, would it not? The bonus is that we don't need any 'sophisticated' software with its inherent traps to do it - a simple position transducer triggering a switch with a 're-close' button would be fine.
Has been effectively required for ages, the presence of a simple DIRECT switch to get rid of any sophistication or protection on demand.