Aircraft operation and maintenance Nyír-Air service Kft., which is a sister company of Tréner Kft., performs the repair and operation of numerous aircraft throughout Europe. For decades, we have been providing airworthiness maintenance for the aircraft of our contracted foreign and domestic partners. At our maintenance base equipped with a special painting hangar, in addition to repairing aircraft, our staff strives to realize the painting design that meets your needs. We have extensive experience in restoring AN-2 and Kamov KA26 aircraft. In addition, we undertake major repairs, periodic maintenance, and avionics modernization of the following aircraft: