Put safety barriers at the entrance to the work area.

A. In some cases, for complex aircraft, special training should be conducted so that the aircraft and its systems can be maintained properly.

B. Sometimes, especially for complex airplanes, it may be necessary to provide specific training in the proper maintenance of the airplane and its systems.

C. Sometimes, for particularly complex airplanes, it is required to provide special training so as to perform proper maintenance of the aircraft and its systems.

A. 某些词会有注释告诉你使用其他批准的专用词汇或不同的形式。

B. 某些词会有注释告诉你使用其他批准的更佳的词汇或不同的结构。

C. 某些词会有注释告诉你使用其他批准的替代词汇或不同的形式。

A. 与本规范的符合性相关的重要意见应予以公布。

B. 对于和本规范相抵触的重大意见应予以公布。

C. 应发布符合本规范的重要议题。

A. When the weight or torque of the aircraft change, illustrate how to keep this record in order to save the exact initial values to measure the weight and heavy center in normal flight.

B. Explain how to maintain this record when changes to the weight or moments of the airplane are made so that accurate starting data is available to calculate the weight and center of gravity during normal operation of the airplane.

C. When the changes to the mass or momentum occur, show the way to hold this record to get the beginning information easily to compute the mass and gravity core.

A. CAP是飞机持续适航的初级文件，包括各相关程序。

B. CAP是包含飞机持续适航程序的主要文件。

C. CAP是飞机持续适航的初始文件，由相关程序组成。

A. 你需要在安装发动机时更换大量零件。

B. 更换发动机时，你可以安装大量部件。

C. 在发动机安装时可能更换大量部件。

A. For normal operations, make sure the pressure relief valve is closed. An open pressure relief valve is a symptom of a problem in the fuel vent system.

B. For normal operations, make sure the shutoff relief valve works. If you open pressure relief valve, that indicates a problem in the fuel vent system.

C. For normal operations, make sure you close the pressure relief valve. If you leave it open, a problem will be shown in the fuel vent system.

A. Unscheduled maintenance checks are those maintenance checks and inspections on the aircraft, its systems and units which are recognized by the manufacturer as special or unusual conditions which are not related to the time limits specified in -10 above.

B. For the unscheduled maintenance checks and inspections of aircraft, aircraft systems and components, the manufacturer shall not include special or unusual conditions from the time limits specified in -10.

C. If the unscheduled maintenance checks and inspections on the aircraft, its systems and units are special or unusual conditions, the time limits specified in -10 shall be referred to by the manufacturer＇s.

A. 一体式电路一般包括一体式部件以及以单片结构执行完整电路功能的器件。

B. 集成电路一般包括那些具有集成元件、以单片结构执行完整电路功能的器件。

C. 集成电路总是包括那些具有一体化元件、以整体结构实现完整电路功能的器件。

A. 在升降飞机时，要确保操作升降设备的人员接受过恰当的培训并具备相应的知识。

B. 在对飞机进行平衡、顶升或放下时，确保人员接受过升降设备的培训并掌握相关技能。

C. 当水平放置飞机或顶升飞机时，确保操作升降设备的人员学过培训知识。