Avtron Manufacturing's AVRPlus is a universal Generator Control Unit (GCU) that replaces flight-worthy GCU's when testing generators, constant speed drives (CSD's), and integrated drive generators (IDG's). One AVRPlus can replace up to 100 different GCU's simplifying and greatly reducing the total cost of testing. The AVRplus is designed to interface with Avtron's line of drive stands, which include the Avtron K400B, K738, K838, K838AT and K938. The AVRPlus will also interface with drive stands made by other manufacturers.