When there is a fire in the main wheel well, the compartment overheat detection controller provides a signal for the two red FIRE WARN lights and the bell.

A. To make sure that ATC transceivers are in standby mode, you must simulate altitude, otherwise false TCAS signals may occur intermittently.

B. Make sure the ATC transmitters are in standby mode, or false TCAS targets may occur accidentally due to altitude simulation.

C. Make sure that the ATC transponders are in standby mode when you simulate altitude. You can accidentally cause false TCAS targets.

A. 如果没有明显迹象表明紧固件松动，在紧固件头部和相邻材料上标记一条红线。

B. 如果紧固件松动的迹象不清晰，则跨过紧固件头部在相邻材料上标记一条红线。

C. 如果没有清晰地显示出紧固件松动，则在紧固件头部和相邻材料的上方标记一条红线。

A. Airplane maintenance manual or section should contain at least the following information: about the airplane and its systems and installations including its engines, propellers and articles.

B. Airplane structure manual or section should consist of at least the following information: data of the airplane and its systems and installations excluding its engines, propellers and appliances.

C. Airplane maintenance manual or section, which includes at least the following information: a description of the airplane and its systems and installations including its engines, propellers and appliances.

A. The Design Authority is responsible for approving and changing the repair procedure.

B. Any alteration to this repair procedure must get verbal approval of the Design Authority.

C. If you change this repair procedure, get approval of the Design Authority.

A. 组装总管。

B. 安装连杆。

C. 安装总管。

A. Make up for all gaps which are larger than 0.05 mm.

B. Repair all cracks that are wider than 0.05 mm.

C. Overhaul all fissures which are greater than 0.05mm.

A. 这种物质在高浓度时是有毒的。

B. 在高度浓缩后，这种材料会有毒。

C. 这种材料在高温下会易燃。

A. 不要通过操作刹车来减少蓄压器的压力。

B. 为了减少储压器的压力，请不要操作刹车。

C. 不要使用刹车来增加储压器的压力。

A. When the indicator is visible, stop the pump.

B. When the indicator comes on , stop the pump.

C. Stop the pump unless the indicator comes into view.

A. Turn the drain valve counterclockwise to cause the fluid to stop flowing before the valve is pushed.

B. When you turn the drain valve counterclockwise, no fluid will flow until you push the valve in.

C. Make sure there is no fluid flowing after the valve is pushed, then turn the drain valve clockwise.