Summary of Change. Volume 3, Chapter 21, Section 1, Scope, Concepts, and Definitions.
Paragraphs 3-1496 through 3-1500 incorporate new information.Revisions to this section are necessary as a result of the Qualification, Service, and Use of Crewmembers and Aircraft Dispatchers (part 121 subpart N&O) final rule. This section includes general information about related aircraft differences training and deviations based on designation of related aircraft. Principal operations inspectors (POIs) of part 121 certificate holders who use an Advanced Qualification Program (AQP) to train flightcrew members may be impacted if the certificate holder revises their AQP to include related aircraft differences training.