CS-VLA 779 Motion and effect of cockpit controls
ED Decision 2003/18/RM
Cockpit controls must be designed so that they operate in accordance with the following movement and actuation:
(a) Aerodynamic controls -
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Motion and effect |
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(1) Primary controls: |
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Aileron |
Right (clockwise) for right wing down. |
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Elevator |
Rearward for nose up. |
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Rudder |
Right pedal forward for nose right. |
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(2) Secondary controls: |
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Flaps (or auxiliary lift devices) |
Forward or up for flaps up or auxiliary device stowed; rearward or down for flaps down or auxiliary device deployed. |
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Trim tabs (or equivalent) |
Switch motion or mechanical rotation of control to produce similar rotation of the aeroplane about an axis parallel to the axis control. Axis of roll trim control may be displaced to accommodate comfortable actuation by the pilot. Direction of pilot’s hand movement must be in the same sense as aeroplane response for rudder trim if only a portion of a rotational element is accessible. |
(b) Powerplant and auxiliary controls -
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Motion and effect |
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(1) Powerplant controls: |
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Power (thrust) lever. |
Forward to increase forward thrust and rearward to increase rearward thrust. |
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Propellers |
Forward to increase rpm. |
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Mixture |
Forward or upward for rich. |
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Carburettor, air heat or alternate air. |
Forward or upward for cold. |
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Super charger. |
Forward or upward for low blower. |
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Turbosuper-chargers. |
Forward, upward or clockwise to increase pressure. |
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Rotary controls. |
Clockwise from off to full on. |
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(2) Auxiliary controls: |
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Fuel tank selector |
Right for right tanks, left for left tanks. |
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Landing gear. |
Down to extend. |
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Speed brakes. |
Aft to extend. |
EASA regulations mandate standardized cockpit control movements in very light aeroplanes. Ailerons, elevator, and rudder follow conventional motion. Flaps and trim have specific forward/rearward or rotational directions. Powerplant controls like thrust levers and mixture adjust forward/upward. Auxiliary controls such as fuel selectors and landing gear also have defined movements.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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