Originally Posted by
HazelNuts39
The AD suggests that the initially commanded movement of the elevator could be too abrupt when the real speed of the airplane is much greater than what the AP 'thinks' it is.
Hmmm, my line of thinking went more in the direction that the actual speed was lower than what the sensors showed.
This would mean that following re-engagement of AP at a lower altitude 'Otto' would try to pull up at best climb (or max climb?) for the determined airspeed.
If the real speed is lower than what Otto thinks that's a perfect receipe for disaster. Trim Nose up, to high of a pitch angle and the engines below CG pushing hard causing further pitch up. Having no visual reference makes it hard to determine timely that something is going South.
The really intriguing question is: Why would the two gentlemen in row 0a/b be confident enough to re-connect the AP immediately after a significant upset.
On the other hand in the AD it was mentioned that exactly this happened in two prior cases. And the FPV being back maybe further increasing the confidence in everything being fine again.
Maybe even knowing they were in degraded law in heavy IFR they thought the AP might be the safer choice.
Just speculation though although a picture is starting to form...