Source: People’s Daily client
is the first in the world! The first c919 delivery aircraft completed the "heart replacement"
"The engine test run is completed, the parameters are normal, and the leakage inspection is normal!" Recently, with the test run of China Eastern Airlines' first domestic large aircraft C919, all parameters were normal, marking the first c919 delivery aircraft in the world The first engine change (engine replacement) was successfully completed. The successful replacement further tests China Eastern Airlines' domestic large aircraft maintenance and support capabilities, fills a gap in domestic large aircraft maintenance capabilities in civil aviation, and marks a new level of China Eastern Airlines' domestic aircraft engineering management and maintenance support capabilities.
In aircraft maintenance projects, aircraft engine replacement is one of the most difficult and complex tasks. The main purpose of replacing the engine this time is to verify the feasibility of the C919 engine replacement procedure and at the same time achieve B-919a aircraft engine echelon management improves aircraft safety. China Eastern Technology Company, which is responsible for the engine replacement work, researched and deployed from multiple aspects such as personnel qualifications, document preparation, tooling equipment, factory facilities, aviation consumables preparation, etc., and formulated a detailed plan. Ensure that hair replacement work is carried out safely and orderly. The overall power system (ips) of the
c919 aircraft has a new design concept. The engine reverse thrust uses a unique O-type duct structure, which can reduce flight resistance and improve fuel efficiency compared to the C-type duct structure of other aircraft models. However, this unique design also brings challenges to maintenance work.
In order to successfully complete the first replacement of the C919 aircraft engine, various departments of China Eastern Technology Company and the Northwest Branch of China Eastern Technology, which mainly performs engine replacement operations, jointly reviewed the maintenance manual, use of tooling, and possible difficulties in the disassembly and assembly process one by one. Sort out and evaluate, and formulate a complete work plan. Through combing, a total of 10 differences in engine replacement between C919 aircraft and other aircraft types were identified, and 30 control measures were formulated, including special processing procedures based on the characteristics of ips.
The replacement of aircraft engines is mainly divided into "disassembly, installation and testing". In the early stage of the replacement, China Eastern Technology Northwest Branch transported engine brackets, O-type reverse thrust brackets, rear core cover brackets, front core cover spreaders and other replacement tools to the hangar in advance, and paid attention to the use of tooling. Matters and other matters are made into reminder cards and posted in prominent locations, and hair replacement personnel are organized to conduct multiple operating drills on hair replacement tools. China Eastern Technology's maintenance engineers spent 9 days completing the engine oil seal, reverse thrust disassembly and assembly, core cover disassembly, engine replacement, variable frequency generator disassembly and assembly, engine drive pump disassembly and assembly, eec test, idle test, power function test, With 60 routine tasks including acceleration tests and more than 10 non-routine tasks, the company successfully completed the first engine replacement of the C919 aircraft with aircraft number b-919a.
It is reported that China Eastern Airlines Technology obtained the C919 engine replacement maintenance capability this year, becoming the first aircraft maintenance company in the world to have this maintenance capability. In the future, China Eastern Technology will work with COMAC to further optimize the engine replacement process, improve engine replacement efficiency, and promote the continuous improvement of the competitiveness of the domestically produced large aircraft C919 products.
