Drains let fuel in the vent system return to the tanks.

A. Examine the door stop fittings for cracks and corrosion.

B. Examine the door stop fittings for dent and corrosion.

C. Examine the door stop fittings for cracks and nick.

A. The turbo engine includes a compressor bleed system, air cooling system, hot air system, and engine starting system. The compressor bleed system can control the airflow through the engine, and the air cooling and hot air systems are used for engine anti-icing.

B. The turbo engine includes a compressor exhaust system for controlling the airflow through the engine, a cooling air system for engine icing, and an engine starting system.

C. The turbine engines include compressor bleed systems used to control flow of air through the engine, cooling air systems, heated air systems for engine anti-icing, and engine starting systems.

A. Move the IDG forward and outboard until it is away from the accessory gearbox, QAD ring and power plant.

B. Move the IDG towards the forward position until the input shaft is away from the accessary gearbox and QAD ring, then move the IDG towards outboard and free of the power plant.

C. After moving the IDG towards the forward position, then it is free of the accessary gearbox, QAD and the power plant.

A. Every model has this function.

B. This function is applicable to all models.

C. Not all models have this function.

A. 机组能用飞行指令需求来控制飞机的姿态。

B. 机组能用飞行指引指令来控制飞机的高度。

C. 机组能用飞行指引指令来控制飞机的姿态。

A. If there is hum from the loudspeaker, don＇t adjust the potentiometer.

B. Adjust the potentiometer unless hear a hum from the loudspeaker .

C. Adjust the potentiometer until the loudspeaker no longer hums.

A. Add 5 ml of hardener to the compound.

B. Add 5 ml of adhesive to the compound.

C. Put 5 ml of hardener to the component.

A. Do not extend or retract landing gear above this speed.

B. Do not lower or retract landing gear exceed this speed.

C. Do not lower or lift landing gear within this speed.

A. 把调查结果写在改进表上。

B. 把试验结果写在测试表上。

C. 把校准结果写在校正表上。

A. Examine the seal for defects.

B. Check the abnormality of the sealant.

C. Inspect whether there are the defaults in the solvent.