The ATEC 122 Zephyr 2000 is a Czech ultralight aircraft, designed by Oldrich Olansky and produced by ATEC v.o.s. of Libice nad Cidlinou. The aircraft is supplied as a complete ready-to-fly-aircraft or as a kit for amateur construction.
The Zephyr was designed to comply with the Fédération Aéronautique Internationale microlight rules. It features a cantilever low-wing, a two-seats-in-side-by-side configuration enclosed cockpit under a bubble canopy, fixed tricycle landing gear, a T-tail and a single engine in tractor configuration.
The aircraft's fuselage is made from composites with wooden bulkheads. The semi-tapered span wing is made from plywood with composite spars and leading edges and employs a UA-2 airfoil. The wing is covered with doped aircraft fabric. The standard engine factory-supplied was the Rotax 912ULS four-stroke powerplant.
The Zephyr is noted for its low payload. With a useful load of and full fuel of , this leaves only for occupants and baggage.
The Zephyr was later developed into the ATEC 321 Faeta.