Supermarine Spitfire The Spitfire continues to be highly popular at airshows, on airfields and in museums worldwide, and holds an important place in the memories of many people, especially the few still living who flew the Spitfire in combat. Numerous films and documentaries featuring the Spitfire are still being produced, some of which are listed in this section. The Spitfire's performance improved greatly as WWII progressed, for more information see . Supermarine Spitfire The Supermarine Spitfire is a British single-seat fighter aircraft used by the Royal Air Force and other Allied countries before, during, and after World War II. Many variants of
Parts Manufacturer Approval Parts Manufacturer Approval Parts Manufacturer Approval (PMA) is an approval granted by the United States Federal Aviation Administration (FAA) to a manufacturer of aircraft parts. It is generally illegal in the United States to install replacement or modification parts on a certificated aircraft without an airworthiness release such as a Supplemental Type Certificate (STC) or Parts Manufacturing Approval (PMA). There are a number of other methods of compliance, including parts manufactured to government or industry standards, parts manufactured under technical standard order authorization [TSO], owner-/operator-produced parts, experimental aircraft, field approvals, etc. PMA-holding manufacturers are permitted to make replacement parts for