In 1935, the Salmson Company studied an aircraft intended for the training of the pilots of the Air Force. Of traditional wood design, it is presented as a two-seater parasol monoplan with fixed landing gear. It is powered by an air-cooled SALMSON 9 Adr star, 60 hp, driving a three-blade wooden propeller. The pilot and his passenger are installed in tandem
The prototype makes its first flight on April 14, 1936 under the name of D6 Cri-Cri. The Air Force commands 30 copies to equip its EEP (Elementary Piloting Schools), as well as the Naval Air which takes into account two aircraft.
In September 1936, in order to develop the popular aviation, the Ministry of Air orders a hundred D6 Cri-Cri to equip the Aero-Clubs and flying schools throughout France. Many pilots will be trained on this device perfectly suited to learning flight: very stable and able to fly at very low speeds, it has a wide track landing gear that facilitates the taxi.
At the outbreak of war in September 1939, the Air Force requisitioned many Salmson D6 civilians and ordered several copies to the firm to strengthen its ability to train pilots. Despite this, the training of pilots will be chaotic and long because of the congestion of flying schools.
The Salmson D6 Cri-Cri will also be used as liaison devices or in observation and surveillance missions during the Funny War. They will receive a standard camouflage and some will receive a 7.5mm machine gun rear defender.
After the Armistice, some surviving aircrafts will be seized and used by the Germans.

Several Salmson Cri-Cri carried German crosses, but it seems that they were primarily decoy aircraft. Various photographies show such marks, often very poorly painted, but these photographs are very difficult to interpret because some of they are obviously retouched. It is often impossible to be certain that these brands have well worn by the plane, and not just added to the photos. This is particularly the case of a + view showing number 286 F-ARGK, where the "F" of the registration has been roughly replaced by a + n ° 141 ex F-AQUO
"D", with black crosses added on the fuselage and the vertical tail. The same doubt exists regarding 2F + BK number 141 F-AQOQ, which we see on several views alongside a Potez 600, both painted with D-ARGK? n ° 286 ex F-ARGK black crosses.

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