The Avtek 400A was an American prototype turboprop-powered business aircraft, which was developed in the early 1980s. Its configuration was unusual and distinctive : a low-wing monoplane with two pusher engines mounted above the wings, and a large canard mounted atop the forward fuselage. The aircraft's sleek, futuristic design earned it a guest appearance on the Airwolf TV series as the X-400, which was used by the villain, Lou Stappleford in the Eagles episode.
The Avtek's structure made extensive use of advanced composite materials throughout.
In 1998, Avtek declared bankruptcy without the prototype having completed the testing required for US FAA type certification. The company's assets were purchased by AvtekAir, who planned to revive the project under the designation AvtekAir 9000T.