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Old 27th November 2011 | 18:34
  #545 (permalink)  
DozyWannabe
 
Joined: Jul 2002
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From: UK
Originally Posted by Lyman
...and the pilot was given an a/c that was climbing with the NOSE showing low.
It depends on your definition of "climb" - it looks like the tail-end of a small pitch correction due to turbulence that would have ended maybe a second later than it did due to A/P disconnect - the aircraft's pitch attitude was increasing, but all the evidence suggests it was not about to climb significantly, it was simply trying to regain the assigned flight level and pitch attitude.

The pitch attitude was lower than it should have been at A/P disconnect, but it was a matter of 2 degrees - it briefly settled at 2 degrees nose-up after A/P disconnect. That kind of difference is barely noticeable on a modern PFD, let alone steam gauges - it was two points in the blue. It certainly does not require half back stick to correct, which is what the PF did.

He may have mentally been correcting for the bump they felt at disconnect, even though the autopilot was ahead of him - seeing the ADI pointing into the brown for a second might have been a shock. This is where Human Factors comes in. For those who aren't pilots but can drive, would you say you take more care when driving with your loved ones in the car than you do on your own? I know I do. See someone driving erratically or dangerously when you're on your own and it's tempting to just go past him. Do it with family in the car and I'm inclined to leave him to his own devices and back off because it's more than just me at stake. Professional airline pilots live with the knowledge that there are hundreds of people behind them who are depending on their skill - that's part of the job and why I respect them so much. If you're flying a jet that nevertheless has family on board? All of a sudden instincts start to cloud rationality and there's an emotional pull there too (which is why the Aeroflot crash with the children in the cockpit is to my mind the saddest aviation story I've ever heard).

His Pull was additive to an input made by AutoPilot("STALLSTALL")
No - the autopilot disconnected at 02:10:04.6 as mm43 has it. PF inputs begin at approximately 02:10:07 (by your own statement) and the first STALLSTALL does not sound until 02:10:10. There is no "additive input" to the autopilot from the sidesticks.

The problems encountered were not complicated, but the timing was.
It happened in a matter of seconds, no doubt - but the control inputs the PF made were completely disproportionate to what was required from the outset.

Last edited by DozyWannabe; 27th November 2011 at 18:58.
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