An airport approved by the Administrator for use by an air carrier certificate holder for the purpose of providing service to a community when the regular airport is not available is a/an:

1) What is the speed limit (IAS) in airspace class E?

2) The phases related to an aircraft in emergency or believed in emergency are:

3) Transition from altitude to flight level, and vice-versa is done:

4) When an aircraft is subjected to unlawful interference, the pilot-in-command shall indicate the situation by setting the transponder to Mode A, Code:

5) An airport approved by the Administrator for use by an air carrier certificate holder for the purpose of providing service to a community when the regular airport is not available is a/an: