Abstract. This article is devoted to improving efficiency in the technical operation of aircraft. Reducing the cost of aircraft maintenance is one of the most pressing problems facing modern civil aviation, and the practice of many airlines has shown that this is one of the resources for increasing profits. The reliability of aviation technology is the first and necessary condition for the safety and reliability of flight. At the same time, it is necessary to ensure all improvements in the operation of the aircraft fleet. For this, maintenance and repair of the aircraft should be minimized, in which case the cost of the work performed should be low. Introduce new complementary methods to identify flaws and cracks that preserve flight safety and economic performance.

Keywords: Non-destructive test methods, maintenance, fuel tanks, sealant, radiation monitoring.