PPRuNe Forums - View Single Post - AF447 final crew conversation - Thread No. 1
Old 11th Dec 2011, 14:05
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rudderrudderrat
 
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Originally Posted by Clandestino
Since 1988, aeroplanes with uncoupled sticks are allowed to participate in public passenger transport, worldwide. Certifying authorities do not share your concern. What do you know that they don't?
See page 7 of this EASA doc. of MAY 2011.
Sounds like some timely concern to me.

http://www.easa.eu.int/rulemaking/do...%202011-09.pdf

"c) The use of side stick controllers together with electronic flight control systems which provide control augmentation and control deflection limiting systems could affect piloting awareness that the aircraft is approaching a control limited flight condition. It may be that return to normal flight condition and/or continuing of safe flight needs a specific crew action. In these circumstances a suitable flight control position annunciation is required to be provided to the crew, unless other existing indications are found adequate or sufficient to prompt that action.
(2) CS 25.777 Cockpit controls
Side stick controller force-deflection characteristics in pitch and roll together with displacement sensitivity and gains need to be evaluated. The intention is to show that normal inputs on one control axis will not cause significant unintentional inputs on the other. Consequently a new paragraph CS 25.777(i) is proposed requiring a suitable assessment."
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