Double uchebno-training plane L-39 with two-planimetric turbojet АИ-25ТЛ is intended for initial training of cadets of flight schools of the Air Forces and educational organisations DOSAAF to the technics of piloting in simple and difficult meteoconditions day and night, training to elements of the fighting application connected with interception of air targets visually, actions on the land purposes, and also for training of flight structure of flight schools and front parts