Originally Posted by OK465
Once again an interesting question that goes to the crux of whether the FD might have coerced a momentary nose up input out of him a couple of knots above stall speed that put him 'over the edge' as the pitch attitude was nearly under control.
Yes, it is remarkable how, just before the FD reappear, the situation was improving, or at least stopped deteriorating. It is more noticeable in the graph linked by
mm43, just above : The pitch was reducing at 6 degrees and the AoA was getting stable around 5.
But then, the FDs are back !
The question to know if the VLS is computed and displayed is very technical, but I'm not sure it has a big influence on what the FDs are commanding at that moment, or I don't think the resulted command was to put the nose down :
What we can guess is, that the PF, from that moment, is looking for to maintain 15 degrees up, and he's pretty good at it. We know the FDs are displayed, so we may assume the FDs are suggesting that 15 degrees up attitude. I don't see the PF purposely disregarding the FD commands given to him and being that focused and successful. The rule is still : If you don't follow the FD, turn them off.
In that respect, the pertinence of both ADs posted by
A33Zab just earlier is also remarkable ... We were aware of the first one dealing with the operational procedure as an OEB was published, but I was ignoring the second one. You produce a lot of relevant information. Thank you.