Which statement best defines an aircraft tail number?

Which statement best defines an aircraft tail number?

• A. The flight number assigned to the route
• B. The serial number of the engine
• C. An identification number painted on the tail section of the aircraft
• D. The aircraft color code

Answer: (C)

The tail number is the aircraft’s registration identifier, a unique code assigned by the aviation authority and displayed on the tail. It serves as the permanent ID for the airplane in all records, tracking, and official documentation, much like a license plate for a vehicle. This identification stays with the aircraft throughout its life and is what air traffic control, maintenance crews, and regulators use to reference a specific airplane. Flight numbers are for scheduled trips and can change; an engine serial is tied to a specific engine component; a color code is just the paint scheme. So describing it as an identification number painted on the tail section best captures its purpose.

The tail number is the aircraft’s registration identifier, a unique code assigned by the aviation authority and displayed on the tail. It serves as the permanent ID for the airplane in all records, tracking, and official documentation, much like a license plate for a vehicle. This identification stays with the aircraft throughout its life and is what air traffic control, maintenance crews, and regulators use to reference a specific airplane. Flight numbers are for scheduled trips and can change; an engine serial is tied to a specific engine component; a color code is just the paint scheme. So describing it as an identification number painted on the tail section best captures its purpose.