This manual establishes the standardized procedures and regulatory requirements for performing alterations on civil aircraft to ensure airworthiness and safety compliance. The text is compiled by the Government Printing Office to serve as a comprehensive reference for aviation mechanics, engineers, and maintenance personnel. It provides the technical framework necessary to interpret Federal Aviation Administration (FAA) regulations regarding structural modifications, system installations, and equipment upgrades.

Experts recognize this document as a foundational reference for aviation maintenance technicians and inspectors. Readers frequently note the technical density of the prose, which is designed for professional application rather than casual study.