The Stab autotrim feature was never lost in AF447.
Fair enough but... What input would be required for the stab to start trimming forward? Does the stick need to be put in a sustained foward position for a set amount of time or amount to get the stab to start trimming nose down?
It was a nice design touch to make life easy when everything is going normally, but when the sh1t hits the fan, the first thing that is forgotten is...the thing that you never touch in normal operation. Great idea that...
I wonder, had there been no autotrim, if the PF would have manually trimmed all the way back into the stall... I somehow doubt it.
Originally Posted by Bubbers
Yes, seeing a Boeing with the control wheel full back would alert any pilot at high altitude that we can't fly this way...
Originally Posted by Dozy Wannabe
Birgenair 301 and Northwest 6231 show that's not true.
What's not true? The CVRs indicate that the PNFs may well have been basing their comments on that they saw the control column doing.
Read page 30 and 31 of the CVR transcript of 447. It's pretty obvious there was confusion ("Get the wings horizontal", "I’m at the limit… with the roll"; "Climb climb climb climb", "But I’ve been at maxi nose-up for a while") that would not have existed had the PNF and captain been able to see the "control columns" moving in unison.