/**
 * http://blog.flexexamples.com/2008/06/10/disabling-keyboard-navigation-on-the-accordion-container-in-flex/
 */
package comps {
    import mx.containers.Accordion;
    import flash.events.KeyboardEvent;

public class MyAccordion extends Accordion {
        public function MyAccordion() {
            super();
        }

override protected function keyDownHandler(evt:KeyboardEvent):void {
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/06/10/disabling-keyboard-navigation-on-the-accordion-container-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        xmlns:comps="comps.*"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

<comps:MyAccordion id="accordion"
            width="100%"
            height="100%">
        <mx:VBox id="v1"
                label="One"
                width="100%"
                height="100%">
            <mx:Label text="One" />
        </mx:VBox>
        <mx:VBox id="v2"
                label="Two"
                width="100%"
                height="100%">
            <mx:Label text="Two" />
        </mx:VBox>
        <mx:VBox id="v3"
                label="Three"
                width="100%"
                height="100%">
            <mx:Label text="Three" />
        </mx:VBox>
        <mx:VBox id="v4"
                label="Four"
                width="100%"
                height="100%">
            <mx:Label text="Four" />
        </mx:VBox>
        <mx:VBox id="v5"
                label="Five"
                width="100%"
                height="100%">
               <mx:Label text="Five" />
        </mx:VBox>
    </comps:MyAccordion>

</mx:Application>