PPRuNe Forums - View Single Post - AF 447 Thread No. 11
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Old 20th Nov 2013, 12:22
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BOAC
Per Ardua ad Astraeus
 
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Indeed "tongue in cheek".

I don't think I have ever argued that AB was partly 'responsible' for the accident due to the Stall warning 'logic', but just that it was significantly contributory. I agree people would not 'expect' the crew to take an airliner to these realms. However, why WoW was 'abandoned' I do not know - I thought it was a well-proven input? Surely the point is, Owain, that as far as we know there was a 'useable' AoA input available, probably throughout the episode, and indicating a stalled wing. The fact that 'trigonometry' rendered the USE of this signal impossible due to the IAS constraint is indeed relevant, but I cannot see why posters are going on about 'non-swivelling pitot tubes' etc etc. Surely we all understand why the IAS reading was invalid?

I agree with your last paragraph and if that is also the EASA thinking, then good, although as with all ever-increasing complexity of systems there may well be a hidden pitfall in that approach.
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