[1] The Nord 3400 was designed to meet a French Army requirement for a two-seat observation aircraft, with a secondary casualty-evacuation role.

The 3400 was a braced high-wing monoplane with a fixed tailwheel landing gear and an enclosed cabin with tandem seating for a pilot and observer.

The prototype F-MBTD first flew on 20 January 1958, powered by a 179 kW (240 hp) Potez 4D-30 engine.

A second prototype with an increased wing area followed, being powered by a 194 kW (260 hp) Potez 4D-34 engine.

Data from Jane's All the World's Aircraft 1962-63[3]General characteristics Performance