30.We recommended that you do not do this procedure in the hangar.

A. The aircraft safety should be ensured.

B. The flight safety must be assured.

C. The navigation safety must be insured.

A. Solenoid switches shall indicate whether the valve is solenoid-loaded to the open or closed positon.

B. Electromagnetic valves shall include a marking indicating whether the valve is coil-loaded to the open or closed positon.

C. Solenoid valves shall include a notation indicating whether the valve is spring-loaded to the open or closed positon.

A. Repair the broken seals.

B. Repair the damaged sealant.

C. Repair the damaging sealant.

A. Ensure that there is no corrosion on the tubes.

B. Make sure that the tubes have no deformation.

C. Make sure that the tubes have no crack.

A. Manufacturer determines specific range properly to describe sophisticated and professional information.The information can be put in Maintenance Maunal or other documents.

B. Detailed information on more intricate and specific subjects can be written in two ways: Maintenance Manual or individual documents.The two ways are dependent on manufacturer's option properly.

C. It is up to the manufacturer to decide where and to what extent to include detailed information about more sophisticated and professional topics,either in the common Maintenance Manual or in another new documents.

A. 解释如何避免和注意燃油消耗。

B. 解释如何避免和注意燃油污染。

C. 解释如何避免和注意燃油泄漏。

A. Remove the test cap between the Precooler Control Valve and the 3908 sensor on the control pressure sense line and ensure that there is air flowing out of the port.

B. From precooler control valve to 3908 sensor,remove the sense line test cap,make certain thatthe air flows from the test hub.

C. The purpose of the test cap removal from the Precooler Control Valve to the 3908 sensor is to guarantee that there is airflow at the test port.

D. C.The purpose of the test cap removal from the Precooler Control Valve to the 3908 sensor is to guarantee that there is airflow at the test port.

A. Make sure that the scale is not more than 400 knots.

B. Make sure that the indication is not more than 400 knots.

C. Make sure that the indication is not more than 400 miles.

A. 交流发电系统包括变流器、交流发电机、控制和调节组件, 指示系统,连到主汇流条的导线,但主汇流条不包括在内。

B. 交流发电系统包括变流器、交流发电机、控制和调节组件, 指示系统,连到上述部件的导线,但主汇流条不包括在内。

C. 交流发电系统包括整流器、交流发电机、控制和调节组件, 指示系统,连到上述部件的导线,但主汇流条不包括在内。

D. C.交流发电系统包括整流器、交流发电机、控制和调节组件, 指示系统,连到上述部件的导线,但主汇流条不包括在内。

A. 说明如何挖掘潜在的问题,以及出现不良功能时应该怎么办。

B. 解释如何识别即将出现的问题,以及发生故障时应采取的措施。

C. 说明如何确认多发问题,以及如果故障发生应该做什么。