PPRuNe Forums - View Single Post - AF 447 Thread No. 12
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Old 22nd Jan 2015, 22:57
  #907 (permalink)  
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Join Date: Jun 2009
Location: florida
Age: 81
Posts: 1,610
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Once more with confusing flight control laws...

@ TC

Best I can tell from the FCOM stuff I have gotten courtesy of the folks on this thread, until in "direct" law, the system tries to maintain one gee corrected for pitch attitide. So airspeed and AoA are not the biggest drivers even when in alternate laws.

And then the reversion sequence is not all that clear depending upon what sensor or computer you lost. Sheesh.

On the thread about the Indonisian event, the comments about Airbus flight contol law and reversion sequencces are confusing. If you look at the laws in the FCOM, they try to "protect" the plane ( not the pilot) as long as the computers deem the inputs reliable.

So we go from "complete protection" from anything to protection about some roll, pitch angles. Uhhhh, AoA? Gee? What else? Lemme get out that checklist or use the electonic display ( if available) to see where we are. Meanwhile the plane is climbing without a pilot command. The autothrottle might also be doing stuff we have not commanded. Sheesh.

Later, as this old pilot is weary of all the "gotchya" crapola of the new systems. And remember that this old fart flew the first fully electric jet and out reversion sequence was very simple.
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