The COMBO-10S is a combination of air-conditioning and 400Hz diesel ground power unit. It combines TLD Lebrun’s unique refrigeration technology with TLD PowerVamp deep expertise in power electronics and 400 Hz converter. It is a substitute to the APU for regional and narrow body aircraft in all climates using one single piece of equipment. The COMBO-10S design is simple and reliable, using existing and proven technologies. The unit is built with top-of-the-line material and standard parts, resulting in extremely low maintenance requirements. This unit is compact with a low profile to offer a better visibility on the airport fields thus increasing the safety during pre-flight operations, boarding and maintenance. When equipped with the plug-in option, the COMBO-10S can switch from diesel to grid power for a greener approach.