Problem with using XML inside of a Class File

I have created a class file with 2 functions one to load an xml file and the other to parse the file and push the values into an array. My problem is that I can’t access this array inside another function unless pass the array as a parameter or the main timeline. Below is the class file I’m using:

import mx.utils.Delegate;
class XmlTest

    var TechIIIArray:Array = new Array();
    var TechIII:XML;
function XMLContentLoader(arr:Array):Array{
    TechIII = new XML();
    TechIII.ignoreWhite = true;
    TechIII.onLoad = Delegate.create(this, onLoadEvent);
   trace ("This is from the class file --->"+TechIIIArray);
   return TechIIIArray;

function onLoadEvent(success:Boolean)
    if (success)
        var i=0;
        while(TechIII.firstChild.childNodes*.childNodes[0].firstChild.nodeValue != undefined)
            var    rarity:Number = TechIII.firstChild.childNodes*.childNodes[0].firstChild.nodeValue;
            var    itemname:String = TechIII.firstChild.childNodes*.childNodes[1].firstChild.nodeValue;
            var    price:Number = TechIII.firstChild.childNodes*.childNodes[2].firstChild.nodeValue;
            var    tech:String = TechIII.firstChild.childNodes*.childNodes[3].firstChild.nodeValue;
            var    complexity:String = TechIII.firstChild.childNodes*.childNodes[4].firstChild.nodeValue;
            var    book:String = TechIII.firstChild.childNodes*.childNodes[5].firstChild.nodeValue;
            var    page:String = TechIII.firstChild.childNodes*.childNodes[6].firstChild.nodeValue;

        trace("Tech III Array--> "+TechIIIArray);
      trace("file not loaded!");


function getArray():Array{
    trace("This is the Tech III Array returned from the getArray ->"+TechIIIArray)
    return TechIIIArray;


What I would like to do is pass the array to another function in the class file. This function would loop through the array and push certain values into an array that would be returned to the main timeline so I can using them.

Not sure how to do this hopefully one of you AS guru can help me out.