航线维修工作应当按照如下程序实施：维修人员按照分配的任务完成航线维修工作，发现的任何不正常情况应当先向（）报告，并由其决定处置方案，必要时应当协调技术支援或者调整航班计划

27.将旁通活门和排放活门同时拆解

26 PUT THE ADAPTER IN POSITION AGAINST ITS SUPPORT.

25.结构部分被分为三组。

24.In designing schematic diagrams,it may be necessary to compromise between detail necessary to make the diagram self-explanatoryand the simplicity essential for ease of reading
and understanding

23. Whenever practical, each symbol should physicallyresemble the actual system component depicted in the schematic diagram

22.The user of the schematic diagram is the pilot

21.Utilizing an airplane as intended by the manufacturer,combinedwithsound inspection and maintonande practices,forms the basis for assuring the airplane remains airwor thy and safe to operate..

20. 2hours are necessary to do the procedure.

19.twist

18 Trichlor oethylene is a health hazard.