Abnormal Attitude Law
I have been puzzling over the lack of THS movement from fully nose-up. I can't explain the lack of THS movement while in Direct law.
But at 15:45:40 the Pitch Law reverts from Direct to Alternate - this coincides as near as I can judge with a pitch attitude of 50° NU, increasing to 60°. This would put the a/c in Abnormal Attitude Law,which is:
Pitch Alternate, No Protections except Load Factor, and No Autotrim. The Trim Wheel would still control the THS.
Roll Direct
Yaw Mechanical.
These control laws would apply until the pitch reduces below 50° and the speed is above 60 kt. Then the pitch Law reverts to Alternate without protections, but with Autotrim enabled. So from 15:45:55 the Autotrim was enabled, but no THS movement is recorded.
To complete the picture I would like to see the Normal Load Factor and Flap/Slat position read-outs - I am puzzled why the crew retracted the Flaps to Zero.... anyone got any idea?
TP