scope:

This instruction applies to all Navy fixed wing aircraft. It requires implementation by all naval activities having responsibilities for ensuring continued safe aircraft operations. Maintaining and reporting records of aircraft usage, and strict adherence to time compliance requirements for the installation of structural modifications, is required for individual aircraft and components to attain their assigned service life limits. This instruction is closely related to Office of the Chief of Naval Operations (OPNAV) requirements delineated in references (a) and (b), and to other Naval Air Systems Command (NAVAIR) programs published in references (c) through (f). This instruction does not supersede, but clarifies and supplements, reference (a) emphasizing configuration relationships governing the OPNAV limitations. Additionally this instruction does not supersede nor change the requirements Of reference (e).