Part 121

Part 121 is a set of regulations established by the Federal Aviation Administration (FAA) in the United States that governs the operation of large commercial airlines. It outlines safety standards, flight crew training, maintenance procedures, and operational requirements to ensure the safe and efficient transport of passengers and cargo. These regulations apply to airline operators with scheduled flights, helping maintain consistent safety and quality across commercial aviation. Essentially, Part 121 provides a legal framework to ensure airlines operate responsibly, prioritizing passenger safety while maintaining industry standards.