CS 25.779 Motion and effect of cockpit controls

• ED Decision 2003/2/RM found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

CS 25.779 Motion and effect of cockpit controls ED Decision 2003/2/RM Cockpit controls must be designed so that they operate in accordance with the following movement and actuation: (a) Aerodynamic controls – (1) Primary. <table border="1" cellpadding="0" cellspacing="0" width="529"><tr><td valign="top" width="183"><p><b>Controls</b></p></td><td valign="top" width="346"><p><b>Motion and effect</b></p></td></tr><tr><td valign="top" width="183"><p>Aileron </p></td><td valign="top" width="346"><p>Right (clockwise) for right wing down </p></td></tr><tr><td valign="top" width="183"><p>Elevator </p></td><td valign="top" width="346"><p>Rearward for nose up </p></td></tr><tr><td valign="top" width="183"><p>Rudder </p></td><td valign="top" width="346"><p>Right pedal forward for nose right </p></td></tr></table> (2) Secondary. <table border="1" cellpadding="0" cellspacing="0" width="529"><tr><td valign="top" width="183"><p><b>Controls</b></p></td><td valign="top" width="346"><p><b>Motion and effect</b></p></td></tr><tr><td valign="top" width="183"><p>Flaps (or auxiliary lift devices) </p></td><td valign="top" width="346"><p>Forward for wing-flaps up; rearward for flaps down </p></td></tr><tr><td valign="top" width="183"><p>Trim tabs (or equivalent) </p></td><td valign="top" width="346"><p>Rotate to produce similar rotation of the aeroplane about an axis parallel to the axis of the control </p></td></tr></table> (b) Powerplant and auxiliary controls – (1) Powerplant. <table border="1" cellpadding="0" cellspacing="0" width="530"><tr><td valign="top" width="183"><p><b>Controls</b></p></td><td valign="top" width="347"><p><b>Motion and effect</b></p></td></tr><tr><td valign="top" width="183"><p>Power or thrust </p></td><td valign="top" width="347"><p>Forward to increase forward thrust and rearward to increase rearward thrust </p></td></tr><tr><td valign="top" width="183"><p>Propellers</p></td><td valign="top" width="347"><p>Forward to increase rpm </p></td></tr></table> (2) Auxiliary. <table border="1" cellpadding="0" cellspacing="0" width="530"><tr><td valign="top" width="183"><p><b>Controls</b></p></td><td valign="top" width="347"><p><b>Motion and effect</b></p></td></tr><tr><td valign="top" width="183"><p>Landing gear </p></td><td valign="top" width="347"><p>Down to extend </p></td></tr></table>