var request:URLRequest = new URLRequest();
var loader:URLLoader = new URLLoader();
loader.addEventListener(Event.COMPLETE, resultHandler);
loader.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
loader.addEventListener(HTTPStatusEvent.HTTP_STATUS,httpStatusHandler);
request.url = "http://rails/view/resource";
// Set the request type as POST and send the DELETE command as
// a variable in the data of the request
request.method = URLRequestMethod.POST;
request.data._method = "DELETE";
loader.load(request);

<mx:HTTPService id="proxyService"
destination="http://localhost/app/url"/>
<mx:Script>
<![CDATA[
private function sendPut():void {
proxyService.method = "DELETE";
proxyService.send("id=2");
}

]]>
</mx:Script>