The airspace over McKinney (TKI) is controlled from the surface to how many feet MSL?

The airspace over McKinney (TKI) is controlled from the surface to how many feet MSL?

• A. 2900 ft MSL
• B. 1200 ft MSL
• C. 7000 ft MSL
• D. 17,999 ft MSL

Answer: (A)

In U.S. airspace, when the controlled airspace begins at the surface around an airport, it’s designated as a Class E surface area. This airspace extends from the surface upward to the base of the overlying Class A airspace, which starts at 18,000 ft MSL. So the ceiling of a Class E surface area is 17,999 ft MSL. That’s why the airspace over McKinney that is controlled from the surface would go up to 17,999 ft MSL. If you’re thinking about a Class D scenario (where the top is typically 2,500 ft above the surface), that would be a different designation and would be expressed differently in terms of altitude.

In U.S. airspace, when the controlled airspace begins at the surface around an airport, it’s designated as a Class E surface area. This airspace extends from the surface upward to the base of the overlying Class A airspace, which starts at 18,000 ft MSL. So the ceiling of a Class E surface area is 17,999 ft MSL. That’s why the airspace over McKinney that is controlled from the surface would go up to 17,999 ft MSL. If you’re thinking about a Class D scenario (where the top is typically 2,500 ft above the surface), that would be a different designation and would be expressed differently in terms of altitude.