PPRuNe Forums - View Single Post - AF 447 Thread No. 9
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Old 7th Jul 2012, 09:56
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BOAC
Per Ardua ad Astraeus
 
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My apologies if this has been covered in the previous 8 threads/thousands of posts, but can an AB person explain the two reported VS vertical modes in the report, 'VS+6000fpm+' and 'VS+1400fpm'?

My experience of FDs/A/Ps is that if the selected ALT is 350 and I am climbing above that I would expect a -ve VS demand to regain. Where did these two UP 'settings' come from? To what 'target' were the FD controllers working? Were these figures software/system induced or crew selected?

It seems as if the FDs, when 'valid', were reacting to the existing rates which is not the way I expect - ie 'Flight Followers' rather than 'Flight Directors'.
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