1.1This specification covers the use of purchasing agencies in formulating specifications for purchases of aviation turbine fuel under contract.

1.2This specification defines specific types of aviation turbine fuel for civil use in the operation and certification of aircraft and describes fuels found satisfactory for the operation of aircraft and engines. Although not specifically designed for other applications, Specification D1655 fuels also may be used in other applications with or without further modification (for example, additization) when approved by the appropriate authority. The specification can be used as a standard in describing the quality of aviation turbine fuels from production to the aircraft.

1.3This specification 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, for example in ICAO 9977, EI/JIG Standard 1530, JIG 1, JIG 2, API 1543, API 1595, and ATA-103.

1.4This specification does not include all fuels satisfactory for aviation turbine engines. Certain equipment or conditions of use may permit a wider, or require a narrower, range of characteristics than is shown by this specification.

1.5Aviation turbine fuels defined by this specification may be used in other than turbine engines that are specifically designed and certified for this fuel.

1.6This specification no longer includes wide-cut aviation turbine fuel (Jet B). 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.

1.7The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.