The Ahrens AR 404 was a prototype American civil transport aircraft first flown in 1976, a high-wing monoplane powered by four turboprop engines.

In order to facilitate the loading and unloading of cargo, the fuselage was of constant rectangular section along almost its entire length, the main undercarriage was retracted into sponsons on the fuselage sides, and the tail included a loading ramp.

As a regional airliner, the AR 404 was designed to carry 30 passengers, or in its cargo configuration, to accommodate four standard D3 freight containers.

The first production aircraft was built and flown there on October 26, 1979,[1] but no more were constructed after financing was withdrawn.

Data from Jane's All The World's Aircraft 1980–81[1]General characteristics Performance