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This specification covers the general requirements for pneumatic control valves for use with the starters on aircraft gas turbine engines. This specification shall be used in conjunction with AS943, ARP949, and AIR1639.

The information contained in this report has been simplified to facilitate its use. Specific manufacturers should be contacted for more detailed information. Many of the basic power plants are available in numerous configurations to provide shaft power or electrical power in addition to the pneumatic capability. Vehicles for the ground transportation of the power supplies are also varied to fit specific requirements. The state-of-the-art in small gas turbines has advanced to a point where they are competitive with the more conventional ground power supplies in practically all areas.

The starters covered by this specification shall be designed to operate on compressed air from ground support equipment, engine interbleed or on board air supply.

This Aerospace Standard establishes the common requirements for hydraulic starters, suitable for use in aircraft and missiles, and the methods to be used for demonstrating compliance with these requirements.