Part 139 regulations do not apply to which of the following airports?

Part 139 regulations pertain specifically to the certification and operation of airports that serve certain types of air carriers and are designed to ensure safety and operational standards at these facilities. Therefore, understanding which airports are excluded from these regulations is key to grasping the full scope of 14 CFR Part 139.

Airports that serve only scheduled operations by large carriers are not automatically exempt from Part 139; they must meet specific criteria to attain certification. Similarly, airports operated by the US government, such as military airports, may also have separate regulations and may not fall under Part 139 guidelines.

Furthermore, airports in Alaska that serve small air carriers are specifically noted for their exemptions from certain federal regulations due to the unique operational context in that region. These exceptions accommodate the operational realities and safety needs specific to smaller air carriers in Alaska.

Therefore, because all the listed categories of airports do not fall under the scope of Part 139 regulations, the choice indicates that none of these types of airports are subject to these particular federal safety regulations. Understanding the nuances of these exemptions reinforces the overall comprehension of airport operations and regulatory compliance.