Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Prospects of practical application of measuring phase-chronometric technologies for diagnostics and maintenance of reliable operation of aircrafts A.S. KOMSHIN According to many leading scientists of the world, we have entered the era of the fourth industrial revolution, which is accompanied by the fact that digital technology deeper and deeper into different areas of our lives at the level of samebecause systems, cloud technologies, additive technologies, and living biological systems. The current stage is special in the development of measuring and diagnostic technologies. The article describes the state of Affairs related to the diagnosis of complex technical systems. The analysis of the main spheres in the present time for prediction and prevention of emergency situations and disasters. Built measurement and diagnostic system on the example of the angular gear of the helicopter. Keywords: phase-chronometric method of control, helicopter, gear, energy system, measurement technology, metrological support. Contacts: E-mail: komshin_as@mail.ru Pp. 39-43.