1. The repair shop that undertakes the task of aircraft overhaul receives the overhauled aircraft into the factory, conducts a comprehensive inspection, and inputs relevant data into the overhauled aircraft database. This includes information such as aircraft missing parts, serial parts, external damage, the number of times the aircraft has been overhauled, the number of calendar years used, the total flight time and the number of flights, as well as the failures and accidents that have occurred in the use of the aircraft.
2. Disassemble and clean the aircraft. Because the aircraft parts need to be replaced during the overhaul, it is necessary to disassemble the overhauled aircraft. Before disassembly, it is necessary to exhaust the oxygen, nitrogen and other gases on the plane, as well as the main and auxiliary oils such as fuel oil and hydraulic oil, to paint the whole machine, remove the engine and seal it. Then the aircraft is gradually decomposed and cleaned according to the scope specified in the process specification.
3. Repair and replace. Including fault inspection and nondestructive testing of aircraft airframe structure and parts; Carry out surface treatment on parts that need surface repair; Repair aircraft accessories and airborne equipment; Replace the parts on the plane that have time requirements, life requirements and must be replaced.
4. Final assembly and commissioning.
5. test flight.
Finally, the aircraft that has completed the final assembly is painted and delivered from the factory.
Aircraft overhaul, especially D-level overhaul, is the most complete and comprehensive means of aircraft maintenance inspection, which usually takes a lot of manpower and time and is expensive. Therefore, airlines usually plan and arrange overhaul in advance to ensure the safety and performance of aircraft.
