What is typically included in the responsibilities of "Part 139" airports?

The responsibilities of "Part 139" airports are fundamentally centered around full compliance with safety standards as outlined by the Federal Aviation Administration (FAA). These regulations establish requirements for the certification and operation of airports serving scheduled air carrier operations.

Part 139 includes a variety of mandates that ensure the safety of aircraft operations, passenger handling, and overall airport management. This encompasses regular inspections of the airport facilities, adherence to safety protocols, and training for personnel involved in ground operations. By ensuring compliance with these safety standards, Part 139 airports maintain a higher level of operational integrity that is crucial for public safety and confidence in air travel.

The other options do not align with the key objectives of Part 139 airports. The suggestion of operating outside of commercial regulations is contrary to the defined parameters of Part 139, which specifically applies to commercial operations. Serving exclusively general aviation is also inaccurate, as Part 139 airports are primarily focused on commercial air carrier services. Lastly, the notion of operating only during daylight hours is not a requirement of Part 139; many airports operate 24 hours a day, depending on their capabilities and traffic needs.