The Military Aircraft Works No. 4 were founded in 1952 as the Military Aviation Overhaul Base within the confines of then existing military airport Warszawa-Boernerowo. The Works started to recondition aircraft that participated in World War II such as: Jak-9P, the Jak-17 fighter planes, IŁ-10 strike aircraft and Pe-2 bombers. Specialized repair divisions were set up to perform all the necessery work to restore full operational fitness to airplanes and engines, starting from disassembly through repair processes to final tests and test flights.

In 1957 the Works were transformed from a Ministry of National Defense financed entity into a financially independent entity organizationally subordinate to the Ministry of National Defence. At that time the Works were given the name Aircraft Repair Works No. 4, later in 1982 changed to Military Aircraft Works No. 4.

On 26.10.2007 the act of commercialisation of the owned-by-state enterprise was signed, Military Aircraft Works No. 4 located in Warsaw - are from the date of 01.01.2008 transformed into the stock corporation having the authorized share capital of 54.000.000 zloty. The Management Board consists of two persons: President of the Board - Mr. Jan Piotrowski, former Director of the Military Aircraft Works No. 4, and Mr Pawel Pszenicki, former Technical Director.

The real development of the Works started with the introduction of jet technology and start up of overhauls of jet powered MiG-15, MiG-15bis fighters and IŁ-28 bombers. At that time engine overhauls began on airplanes such as: the RD-45, WK-1, WK-1A and WK-1F.

The increased demands for specialized work, introduction of newly equipped machines and diagnostic equipment also required increased service areas. During the 1960s new facilities were constructed, such as: electrical and radio systems overhaul division, aviation armament overhaul division with a firing range for aircraft weapons testing, and a test bed for jet turbine engines.

In the years 1963-1964 airplanes were no longer overhauled, concentrating primarily on engine overhauls. The Military Aircraft Works became the prime specialised facility for overhauling turbine engines. Successive aviation development required that overhauls had to be initiated on other types of engines. Thus, the Works have successively been adapted to the rapidly changing needs. The current reconditioning program includes the GID-350 engine for Mi-2 helicopters, R-11, R-13 and R-25 engines for Mi-21 and the AŁ-21 for the Su-22 aircraft.

The Military Aircraft Works No.4 already overhauled over 15.000 engines. The Works employees possess extensive knowledge and experience, as well as high moral-ethical values, which are necessary at every aviation facility.