Quiz Time: Tail Numbers Test your knowledge of tail numbers. By Plane and Pilot Updated April 29, 2020 Save Article Tail Numbers 1. Aircraft registered in the United States are required to have “N”-numbers displayed on the fuselage sides. When did the FAA stop requiring them on the underside of the wing? 1932 1947 1960 1965 They were never actually required. 2. International aviation-governing body ICAO has granted five countries their very own letter for their “tail” numbers. The United States has “N.” Which country below doesn’t have its own numbers? The U.K. Russia Germany Canada 3. Two letters aren’t allowed in U.S. tail numbers. Which one of these letters (represented by its phonetic word), isn’t allowed to follow the “N?” Alpha Oscar A second November Zulu X-Ray 4. In general, how tall do N-numbers have to be? 4 inches 6 inches 8 inches 12 inches 5. Which of the following isn’t a requirement for U.S. fixed-wing N-numbers? Spacing Width Thickness Shade All of these are regulated. 6. In the U.S. you can reserve an N-number. How much does it cost to do that? $5 $10 $25 $50 7. Which length of numbers preceding the two ending letters are disallowed? 1 2 3 4 5 8. Which of the following aircraft model names might the FAA disallow for display on the fuselage? Diamond Beaver Navion Cherokee Skymaster 9. What term(s) does the FAA use generically in regulations relating to the numbers and letters that make up an N-number? They call them “Letters and Numbers” Characters Marks Scribings Name First Last Email Yes, I’d like to receive the FREE Newsletter for the latest news, information and exclusive promotions. Information will be used in accordance with our privacy policy. Sign me up! Privacy Policy.Date MM slash DD slash YYYY Advertisement