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Old 26th June 2009 | 20:02
  #2386 (permalink)  
Flyinheavy
 
Joined: Mar 2009
Posts: 57
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From: S23W046
Angry Downgraded Flt Ctrls

I want to strongly confirm that I am not 'anti-Airbus', BUT this is giving me goose bumps:

It is interesting that the report notes that the AIRPLANE OPERATING MANUAL states that when comparison between both ADR systems is impossible (ADR-DISAGREE) and the stby system isn't available either, as was the case here, the flight crew should act on their own discretion and experience.
Does that mean in a situation like this the pilots are left alone completely and supposed to find out how to overcome it? That is what I ment earlier with machine-human interface. I am not as naively as to think that one could take care of any thinkable problem, but leaving the user of a highly computerized system alone when it breaks down, without giving some advice how to safe the day, is simply unacceptably. Or does it arrogantly implicate that a situation like this never ever could exist? This on an a/c that 'anybody' could fly?

Quote:
If they were on direct law, they were lucky, IMHO. In alternate law, if IAS goes to a (right or wrong) low figure one has to pull the stick to avoid nose down automatic command (and the contrary for high - right or wrong - IAS reading).
What’s the design justification for even having altenate law? Wouldn’t it be better for the pilot simply to know that the normal law envelope protections are gone, rather than have to remember which subset of them are still in effect? In some ways, partial envelope protection (if that’s what alternate law provides) is worse than none at all – especially if the transition occurs at a difficult moment, as seems to be inherently the case.
Not only ONE 'Altn Law', there are TWO with slight differences protectionwise. So it is even more complicated.

Why do we as pilots accept something like this?

I am positively not against modernization, but I do have problems with accepting a system that rather cold calculates the 10^9 case and more or less pushes the pilot out of the loop. This is my oppinion, but as far as I remember, air law in any country holds us primarily responsible for the safety of persons on bord. Did we give up on this?
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