The purpose of this SAE Aerospace Recommended Practice (ARP) is to provide recommended test fluids for testing of electrical components used on aircraft exterior or for ground support near aircraft. These fluids were selected based on a consolidation of test fluids used by military and commercial sources and on review of national and international component specifications. These recommendations are general guidelines. Safety factors for any unusual testing applications or operating conditions should be given special consideration by the designer. The test fluids provided are intended to be recommendations and are not intended to limit or supersede those recommended by aircraft or ground support equipment manufacturers.