实习报告摘要

1.IntroductionAccording to the teaching and training program of SIAE, I have my blue-collarinternship at the Maintenance Base in Chengdu of Air China Technics during 4 weeks,from July 6 th ,2015 to August 2 nd ,2015 .In accordance with the arrangement of the enterprise, firstly I carried out a two weekinternship in the engine department, this period is mainly at the lead of manager ZhongZhi,manager Zhu and other technicians, and then spent the remaining two weeks internship inthe human resources department. APU products as one of the four main products go handin hand of the base with line maintenance and overhaul of aircraft and accessories repair,the engine department APU workshop is also an important part of the base, mainly incharge of APU decomposition, cleaning, repair and inspection, assembly, testing, factoryrelease.2.Major job contentDuring the period, we observed and participated in a APU (Power Unit Auxiliary)’sentire process from the factory, the decomposition to the assembly, testing until the release.We wear gloves and masks cleaning parts; use a magnifying glass to carry out visualinspection; select and classify nut screws; personally involved in the testing of the speedsensor such a series of tests; observe the assembly balancing process, fluorescentinspection, inspection. During my internship, I also had the privilege of visiting a set ofCFM56-5C engine, to understand the main parts of the intergrated driven engine.Disassembly is the first step in the maintenance of APU, disassemble the APU into separated unit in order following the instruction of job card,remove the rubber sleeve used for sealing on the tube, remove the folder, cover the port of some important parts, put then into boxes and then send them to clean workshop in order to avoiding the harm of cleaning liquid or corrosion.Cleaning for 60min with airplane cleaning liquid of 65 degree and then placed in an oven drying, oven temperature is 71 degree, air drying then cover with plug toprotectthe surface, finally hung up a sign.Inspection and detectionProbe detection is with the help of a probe pen of different diameter, the principle is that if the size of scratches is less than the diameter of the probe, the probe beads will not fall but move along the same plane smoothly; if the size of scratches is more than the diameter of the probe,the motion of probe is not in the same plane, we can have an obvious feel of halt.The operation method of fluorescence detection is to penetrate the surface of the material with the fluorescent dye, and then use the fluorescent material to determine the location, size and direction of the crack.For some of the parts that could be used, such as the nut screws, we need to check whether it has damage or not after cleaning and select useful nut screw then classify.The nuts which have clear indentation couldn’t be used, because they are not suitable for playing the torque any more.The test principle of rotation speed sensor is theFaraday electromagneticinduction phenomenon. One end of the test system is a fixed magnet, the rotation of sensor cutting magnetic lines to generate electric field,we will receive the voltage and frequency data with the help of oscilloscope.The assembly work of an APU can last for about three days, a very important part of assembly is the balance. Put the load compressor stator and rotor, two stage turbine in order and then add hydraulic pressure, check the balance with the help of a special machine.I have learned a lot from this practice, I understand aviation maintenance personnelwork, have a more clear understanding for future study and work, which will plays apositive role in my future career planning.Make insuranceTo make insurance is the basic technology of aircraft maintenance and the essential program in steward training. The aim of insurance is to fasten, it must be done in the direction of fasten the part that need to be made insurance. To make insurance, we have professional tools, the first buckle is 120°，and the rest is 60°. While making insurance, the strength should be well-distributed and uniform.3.GainsThrough this internship, I have a more intuitive understanding of the aircraftand the significance of maintenance work more clearly,I had expericed the rigours of the aviation industry.Every step must be in strict accordance with the job cards, you must sign your name after every step you have done, there will be quality inspection personnel standing by and supervising. It is because these lovely civil aviationpersons’pay that insure the safety of every take-off and landing.At the same time, the steward technicians teaches methat practice makes perfect with action. We must work hard, work steadily.In the process of uploading files, I learned to do things carefully and thinking from another perspective.。