The ignition unit is cooled by the air taken from the fan duct.

A. Make the necessary repairs during the next applied spot check.

B. Make the required repairs during the next applicable preliminary inspection.

C. Make the necessary repairs during the next applicable scheduled maintenance.

A. 该规范包括一些新材料或新方法。

B. 该规范包含小型的新材料和新方法。

C. 该规范几乎不包括新材料或新方法。

A. You may use alerts and cautions to emphasize some important places.

B. The important parts must be highlighted by using the warnings, cautions and notes.

C. Warnings, cautions and notes may be used to highlight or emphasize important points.

A. The system is pneumatically operated and mechanically controlled.

B. Hydraulic power drives the system, while electricity is connected.

C. The system is hydraulically operated and electrically controlled.

A. Replace the No. 1 and No. 2 computers. Then do the test again.

B. Interchange the No. 1 and No. 2 computers. Then do the test again.

C. Repair the No. 1 and No. 2 computers. Then do the test again.

A. 显示器顶部和左侧角落的数字指向相关页面。

B. 显示器左上角的数字代表手册对应页码。

C. 显示器左上角的数字代表相关页面。

A. 主要部件的制造商提供的维护、故障排除、检查和修理相关数据应遵守本规范的格式。但对于电源、总线系统、继电器、跳开关、开关以及特定飞机制造商和型号常用的其他部件，可视情在基本的机体维护手册中予以描述。

B. 预计主要部件的制造商将以本规范的格式提供维护、故障排除、检查和维修数据。然而，电源、总线系统、继电器、断路器、开关和其他特定品牌和型号的通用项目，将在基本机身维修手册中进行必要的显示和描述。

C. 主要部件的制造商应按本规范的格式提供维护、故障排除、检查和修理相关的资料。然而，电源、总线系统、继电器、跳开关、开关和其他一些常见的特殊构造和型号将在基本机身维护手册中显示和描述。

A. Corrosion inhibitor is necessary from time to time to ensure continued protection.

B. Corrosion inhibitor is necessary frequently so that protection remains in effective.

C. Corrosion protection is necessary but is ineffective for cost reasons.

A. 拆下附着在法兰到盖子上的四个螺钉。

B. 拆下四个螺钉，将法兰附着到盖子上。

C. 拆下将法兰固定到盖上的四个螺钉。

A. If you do not secure the rigging pin, the elevators will descend when there is pressure in the system.

B. If you do not install the rigging pin, the elevators will move down when there is no pressure in the system.

C. Without the rigging pin installed, the elevators will not lower when there is no pressure in the system.