I am trying to ascertain which sub array from the main array received a click event. My approach below makes use of a switch case at the end for this purpose;

Code:
var localSegment:Array = [segment1.system_Cab, segment1.programs_Cab, segment1.userFiles_Cab, segment1.rollback_Cab]
var external_MediaSegment:Array = [segment2.externalHD_Cab, segment2.virtualDisk_Cab]
var network_LocationSegment:Array = [segment3.homeServer_Cab, segment3.wifiFlashdrive_Cab, segment3.encrivaPlay_Cab]
var superVolumes:Array = [localSegment, external_MediaSegment, network_LocationSegment]


for (var i:Number = 0; i < superVolumes.length; i++ ){
	for (var j:Number = 0; j< superVolumes[i].length; j++){
	var fmCabinent = superVolumes[i][j];
	fmCabinent.addEventListener(MouseEvent.CLICK, openCabinet);
	}
}

var arrayContainer:Array; //create a var to reference the clicked item's parent array
var curIndex:int; //a temporary variable to store the index of clicked object
var targetCabinent;

function openCabinet (e:MouseEvent):void{
    targetCabinent = e.currentTarget;
	for (var i:Number = 0; i < superVolumes.length; i++ ){
	curIndex = superVolumes[i].indexOf(e.currentTarget); //see if the sub array contains the clicked item
	if(curIndex > -1){
       //if the sub array contains the clicked item (e.currentTarget)
       arrayContainer = superVolumes[i][curIndex];
       break; //stop looping since you found the array
    }
	if (targetCabinent.currentFrame == 1){
		targetCabinent.play();
		
	}else {
		fmCabinent.addEventListener(Event.ENTER_FRAME, closeCabinet);
		
	}
	switch(arrayContainer){
    case localSegment:
        trace("You clicked an item from local segment");
        break;

    case external_MediaSegment:
        trace("YOu clicked something from media segment");
        break;

    case network_LocationSegment:
        trace("You clicked something from network_LocationSegment");
		break;
		}
	}
}	//stage.addEventListener (MouseEvent.CLICK, outFocusClose);



function closeCabinet (e:Event):void{
 	if (targetCabinent.currentFrame > 1){
		targetCabinent.prevFrame();
	
	}else{
		fmCabinent.removeEventListener(Event.ENTER_FRAME, closeCabinet);
		//stage.removeEventListener (MouseEvent.CLICK, outFocusClose);
	}
}
However I keep getting a type error in the output tab that says:
TypeError: Error #1034: Type Coercion failed: cannot convert Phoenix_Assetbuilder_fla::Systemfilescabinet_17@5d 1b5661 to Array.