Which part of the FARs addresses aircraft certification?

Part 21 of the Federal Aviation Regulations (FARs) specifically outlines the requirements for the certification of aircraft and related products. This section includes critical information about the process through which aircraft must be evaluated and accepted for safety and compliance with federal standards before they can enter service. It addresses various categories of aircraft certification, including type certification, production certification, and airworthiness certificates.

Understanding Part 21 is essential for anyone involved in aviation, as it ensures that all aircraft meet the necessary regulatory standards for safety and airworthiness. This regulation lays the groundwork for the type approval process, which is crucial for manufacturers and operators to ensure that aircraft are suitable for operation in the National Airspace System.

The other parts mentioned serve different functions within the aviation regulatory framework. For instance, Part 43 deals with maintenance, preventive maintenance, and alterations of aircraft, while Part 91 governs general operating and flight rules for civil aviation. Part 107 pertains specifically to the operation of small unmanned aircraft systems (drones), establishing guidelines for their operation but not focusing on the certification of traditional aircraft.