Flight control modes: Difference between revisions

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mechanical control is not an actual law per se
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DIR is entered if there is failure of three inertial reference units or the primary flight computers, faults in two elevators, or flame-out in two engines (on a two-engine aircraft) when the captain's primary flight computer is also inoperable.<ref name="SmartCockpit - A330 Flight Controls"/>
 
===Mechanical control==
In the ''mechanical control'' back-up mode, pitch is controlled by the mechanical trim system and lateral direction is controlled by the rudder pedals operating the rudder mechanically.<ref name="urlCrossing the Skies » Fly-by-wire and Airbus Laws"/>