Alsie Express ATR 72-500 FSX July 18, 2013 johanfrc Leave a comment Alsie Express ATR 72-500 FSX for the OSP ATR 72-500 base model. These are FSX textures only. The OSP ATR 72-500 base model is required. It can be found at www.avsim.com. Search for osp_atr_72_500_base.zip. tagged with Alsie Express ATR