PPRuNe Forums - View Single Post - AF447 Thread No. 3
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Old 29th May 2011, 02:07
  #507 (permalink)  
bearfoil
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syseng68k

The autopilot drops out involuntarily for other than UAS ADIRU disagree.
The input limits have been posted before, so subject to correction, I believe they are 45 degrees roll, 13 degrees Nose up, and 9 degrees nose down. for reasons other than max deflection, there are trend issues and off phase limiting? When the auto pilot is overwhelmed, the pilots get the a/c back in non degraded Law, Normal, ALTERNATE LAW is self selected if the cause is ADIRU disagree. Again, this is subject to a type guy.

You are precisely on point, for from the moment of A/P drop the pilots know they are in command subject to the Law selected, and they must be 'au courant' instantly. Without putting too fine a point on things, "I have the controls" is a professional and expected thing to say by the PF. He said this, and made a correction just after a/p had dropped, so an out of trim condition is not cause for concern.

I have a bit of a problem understanding why others don't see this handover as the "beginning" of things going rapidly pear.