With the approach of war, the Ministero dell' Aeronautica began a programme to increase the number of pilots available, and ordered a prototype primary trainer from Ambrosini. This aircraft, a parasol monoplane of mixedconstruction, first flew on July 8, 1939, with Guiliano Ferrari at the controls. A production batch of 50 was ordered, but this was quickly reduced to just 10 planes, all of which were delivered in 1940.