The Cessna 400, now marketed as the TTx, is a single-engine, fixed-gear, low-wing general aviation aircraft built from composite materials. Designed originally as a home built kit called the Lancair. It was in production as the Columbia 400 until 2013 when acquired by Cessna. From 2013 the aircraft was built as the Cessna TTx Model T240. It has dual entry doors on either side of the aircraft. The aircraft is also very aerodynamically slick and sporty in appearance. It represents the latest in cockpit instrumentation using the Garmin suite. This is truly a modern aircraft in every sense of the word.