Part 121 (Air Carrier Operations)

Part 121 regulations govern the operations of large commercial airlines, ensuring safety, reliability, and standardization. These rules cover crew qualifications, aircraft maintenance, flight procedures, and operational oversight. They mandate rigorous training, detailed safety protocols, and regular inspections to protect passengers and crew. Essentially, Part 121 sets the legal standards for airline companies to operate safely and efficiently within the United States, promoting consistent practices across the industry.