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CS 25.779 Motion and effect of cockpit controls

Available versions for ERULES-1963177438-8723

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

Version Text

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">Controls</td><td valign="top" width="346">Motion and effect</td></tr><tr><td valign="top" width="183">Aileron </td><td valign="top" width="346">Right (clockwise) for right wing down </td></tr><tr><td valign="top" width="183">Elevator </td><td valign="top" width="346">Rearward for nose up </td></tr><tr><td valign="top" width="183">Rudder </td><td valign="top" width="346">Right pedal forward for nose right </td></tr></table>

(2) Secondary.

<table border="1" cellpadding="0" cellspacing="0" width="529"><tr><td valign="top" width="183">Controls</td><td valign="top" width="346">Motion and effect</td></tr><tr><td valign="top" width="183">Flaps (or auxiliary lift devices) </td><td valign="top" width="346">Forward for wing-flaps up; rearward for flaps down </td></tr><tr><td valign="top" width="183">Trim tabs (or equivalent) </td><td valign="top" width="346">Rotate to produce similar rotation of the aeroplane about an axis parallel to the axis of the control </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">Controls</td><td valign="top" width="347">Motion and effect</td></tr><tr><td valign="top" width="183">Power or thrust </td><td valign="top" width="347">Forward to increase forward thrust and rearward to increase rearward thrust </td></tr><tr><td valign="top" width="183">Propellers</td><td valign="top" width="347">Forward to increase rpm </td></tr></table>

(2) Auxiliary.