With the continuous development of my country's economy, my country's aviation industry has also achieved vigorous development. At the same time, it is also facing the problem of people's increasing attention to aircraft safety. Therefore, how to ensure the safe flight of aircraft has become the focus of the aviation industry. The aircraft engine is often compared to the "heart" of the aircraft, and its reliability is critical to the safe flight of the aircraft. This paper firstly introduces the aircraft of our country engine repair and maintenance status.

Aero-engine repair and maintenance is the inspection, maintenance and repair of aero-engines on designated and irregular schedules. Maintain and restore the technical performance of the aircraft at all times, ensuring excellent serviceability and reliability. In addition, periodic repair and maintenance operations are also required to improve the safety function of the aircraft, reduce flight risks, and extend the service life of the aircraft.

In order to ensure flight safety, my country's technical requirements for aero-engine protection are very strict, and protection operations must ensure that the engine is always in good condition. Unscheduled protection operations are divided into two types: pre-flight and post-flight. The purpose of the pre-flight protection operation is to make a final judgment on the reliability of the engine and ensure that the aircraft enters the ready-to-fly state on time.

Timing protection work is a periodic inspection and maintenance work performed after the engine has been used for a certain period of time. Its contents include: checking the technical situation of the engine, timely finding the wear and damage of the parts, completely eliminating faults and defects, and performing maintenance operations such as adjustment, cleaning, and smoothing. Engines that have been regularly overhauled are required to work reliably in the next cycle. The period of timed maintenance, work content and skill requirements are specified by the protection regulations. When the engine reaches the specified lifespan, it should be sent to the factory for overhaul. The replacement of the engine and the oil seal are also part of the protection work. With the development of fault detection skills and the improvement of planning and production skills, some repair operations have gradually changed to periodic inspection and "as appropriate" repairs of parts, and whether the parts can be used continuously is determined according to the degree of wear and deterioration.

The engine hole detection technology is to insert the endoscope into the special proximity port or other proximity holes reserved on the engine, such as the bleed valve, the burner nozzle hole, etc., under the condition that the aircraft does not decompose the engine in situ, to view the internal structure of the aircraft engine. useful method.