This standard specifies the classification and marking, technical requirements, test methods, inspection rules and markings, packaging, transportation, storage, etc. of aircraft ground air conditioning units. This standard applies to the manufacturing, testing and calibration of aircraft ground air-conditioning units (hereinafter referred to as units) that are powered by electricity, utilize direct expansion evaporative cooling cycle technology, and have their own fans, and the aerodynamic and thermal performance testing and calibration of fuel-driven units. Can be implemented by reference.