This specification covers the use of purchasing agencies in developing specifications for aviation turbine fuel purchases under contract.

This specification sets the minimum property requirements for Jet A and Jet A-1 aviation turbine fuel, and lists acceptable additives for use in civil and military-operated engines and aircraft. Specification D1655 was initially developed for civil applications but has also been adopted for military aircraft. Guidance on the use of Jet A and Jet A-1 in specialized applications is available in the appendix.

This specification can be used as a standard for describing the quality of aviation turbine fuel from production to the aircraft. However, it does not define the quality assurance testing and procedures necessary to ensure that fuel in the distribution system continues to comply with this specification after batch certification. Such procedures are defined elsewhere, such as in ICAO 9977, EI/JIG Standard 1530, JIG 1, JIG 2, API 1543, API 1595, and ATA-103.

This specification does not include all fuels that are satisfactory for aviation turbine engines. Certain equipment or conditions of use may permit a wider range of characteristics than is shown by this specification.

Aviation turbine fuels defined by this specification may be used in turbine engines other than those specifically designed and certified for this fuel.

This specification no longer includes wide-cut aviation turbine fuel (Jet B). The FAA has issued a Special Airworthiness Information Bulletin which now approves the use of Specification D6615 to replace Specification D1655 as the specification for Jet B and refers users to this standard for reference.

Values stated in SI units are considered standard, while other units of measurement are included in this standard.