Single-seat version of the MB.326, the Aermacchi MB.336 made its first flight on Saturday, August 22, 1970. The pilot was Cdte Guido Careftiato, Aermacchi chief test pilot.
The new type, developed in response to an increasing world demand for a simple, high-performance and low-cost operational trainer and close-support aircraft, differs chiefly from the two-seat version in its more powerful engine (Rolls-Royce Viper 632-Y3 of 4,0001b thrust), internal gun installation and additional fuselage tank.
The two prototypes I-AMKK and I-KMAK, were converted from MB-326G to this new model.
The MB.326 developed into the MB 326K as the latest generation model, equipped with Mk 600 Viper engine, able to push 1,814 kg to give an even better performance.