Operate the engine at idle for 20 minutes.

A. 按照服务公告2243，所有开裂的接耳都有两个凸缘衬套安装在接耳孔中，或者在生产时解决直衬套与安定面配合U型槽失配的早期问题。

B. 根据服务公告2243或在生产中，所有出现裂纹的接耳都在接耳孔中安装了两个凸缘衬套，以消除直衬套移入到安定面的配合U型槽中的早期问题。

C. 根据服务通告2243，在生产过程中给所有出现裂纹的接耳孔中都安装了两个凸缘衬套，解决了之前直衬套游移到安定面配合U型槽的问题。

A. You can find electronic devices in nearly all aircraft systems. They are system control and monitoring computer, the control inputs and indications in the cockpit and sensors throughout the whole aircraft.

B. The computer used for system control and monitoring and the control inputs and indications in the cockpit and sensors all over the whole aircraft are the electronic devices used in almost all aircraft systems.

C. Electronic devices can be found in nearly all aircraft systems that are computer for system control and monitoring in the cockpit and sensors all over the whole aircraft.

A. Remove the bolt, washer, and nut to disconnect the bend clamp from the structure.

B. Remove the screw, washer, and nut to disconnect the short clamp from the structure.

C. Remove the screw, washer, and nut to disconnect the loop clamp from the structure.

A. 用米尺来衡量金属盒的容积。

B. 评测金属规则的维度，来作长远的分级。

C. 用一个带有毫米刻度的金属尺来测量尺寸。

A. 飞机爬升会影响导航系统。

B. 导航系统受飞机爬升角度的影响。

C. 飞机爬升率会影响导航系统。

A. 如果微型开关不可用，则起动作动筒以防止损坏活门。

B. 如果微型开关不可用，则执行作动筒的限动程序以防止损坏活门。

C. 如果微型开关适用，为了防止损坏活门对作动筒执行拆下的步骤。

A. 为避免不必要的磨损，将表面涂漆。

B. 为避免不必要的颗粒，将表面清洁。

C. 为避免不必要的摩擦，将表面抛光。

A. The lower seal is invisible prior to switching the lower bearing on.

B. The lower seal becomes visible when you push the lower bearing up.

C. The lower seal comes into view when you pull the lower bearing down.

A. 配电系统包括通风沟、阀门、滑轨、热交换器、操纵装置等项目。不包括使用系统的供应阀。

B. 分配系统包括管道、阀门、作动筒、热交换器、控制器等。不包括输往用户系统的供应阀。

C. 分布系统包括排风管道、阀门、制动弹簧、热交换器、控制器等项目。不包括使用系统的供应阀。

A. The lean fuel flow mixtures will be provided by the EGT indicators under different engine powers.

B. EGT indicators constantly monitor the lean fuel flow mixtures wherever the thrust lever is.

C. The lean fuel flow mixtures are induced by the EGT indicators to various powerplants.