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Major Change Process Document (MCPD)

The Major Change Process Document (MCPD) replaces the New Aircraft Process Guide (NAPG). The MCPD is designed to provide detailed guidance for a certificate holder-requested change of operations that requires validation tests and/or proving tests under Title 14 of the Code of Federal Regulations (14 CFR) part 121. (For example, a request from an existing 14 CFR part 121 certificate holder to add a new Make and Model (Type) of aircraft to its operations.)

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