For more thoughts on this, you can see Post #2934 on the Rumors AF447 thread:
"Post #2934 on Rumors AF 447 Wreckage Found thread"
and Post# 1862 on this thread :
"Post #1862 on Techlog AF 447 Thrd #6"
Originally Posted by
CaptainGef
Hello
If you read the graph p111 between 0211:00 and 0212:45
During all this time this is the stall warning the crew does not believe.
We can see Altitude does not vary too much and to quickly (37924 to 36068)
F/O pitch orders up and down.
Stabilizer from -3 to -13°
Speed is decreasing and as speed is decreasing, they don't see it and what does the THS do on FBW machine?: It tries to maintain flight path, so as speed is decreasing to maintain flight path the autotrim goes up to the limit, incidence is growing up to maintain flight path.
On a Boeing, even in alternate law, you would have to trim as speed decrease to maintain flight path, it would alert you that something is wrong.
Here, it is like if the pilot is being helped, without being conscious, to install the Airbus in the stall.
No sensation on the joystick, if he does not look sharply at his trim indicator, he does not see, he does not feel that the autotrim is trimming for him to install the stall !!
I think it is not the pitch orders that make the THS pitch up. It is the FBW system and this way does not help....
What do you think ?