To describe general guidelines for achieving selected levels of cleanliness in gas turbine engine fuel system components and to describe laboratory methods for measuring and reporting the contamination level of the wetted portion of fuel system components. As in SAE J1227 (covering hydraulic components) this practice includes guidelines for levels of acceptance but does not attempt to set those levels. Purpose To provide standards and procedures for processing and verification to insure an acceptable level of product cleanliness in gas turbine engine fuel system components.