The Aero L-39 "Albatro" might be one of the most popular advance trainer/light ground attack aircraft of the world, more than 2800 L-39s have served with over 30 air forces around the world for more than 40 years.The Albatro first flew on 4 November,1969.

The L-39ZA/ZO/M are all based on the L-39C. The type M is the upgraded version of the L-39C which put out by Ukrain, the aircraft change the engine to the Al-25TLSh. The L-39ZO is the developed version of the L-39C for weapon training missions, they have one pair more pylons under the wing. The L-39ZA is the trainer/light ground attack version of the Albatro, employing sturdier landing gear, a higher payload (total 1,290 kg) and notably provision for a GSh-23L 23mm twin barreled cannon attached in a conformal pod under the pilots' compartment with 150 rounds stored within the airframe.