431.Engage the gear wheel on the splined shaft.

A. During engine run,the number 1 engine oil pressure watch swings.

B. During engine run,the number 1 engine oil pressure gauge fluctuates.

C. During engine run,the number 1 engine oil pressure indication moves.

A. The Maintenance Manual is supplied by the manufacturer at the time of aircraft delivery.

B. When delivering the aircraft,the Maintenance Manual is provided to the buyer.

C. The Maintenance Manual is prepared by the manufacturer before the aircraft is delivered.

A. If a word is only understood by a very small number of people in a specific technical area,it will cause interference in communication.

B. If a word is only understood by a very small number of people in a specific technical area,it will cause disturbing in negotiations..

C. If a word is only understood by a very small number of people in a special skill area,it will cause interference in communication.

A. There are several steps to replace the light assembly.

B. The steps to replace the light assembly are not complicated.

C. The following steps are to change the light component.

A. Please designate licensed personnel to do modification or maintenance to airplane.

B. Alterations or repairs to airplane shall be accomplished and noted by licensed personnel.

C. Please note that alterations or repairs to airplane must be accomplished by licensed personnel.

A. 测量跑道灯连接的电阻。

B. 校准跑道灯连接的电阻。

C. 复核跑道灯连接的电阻。

A. Keep out of the engine before it starts.

B. Keep away from the intake area before the engine starts.

C. Go away from the exhaust area before the engine starts.

A. 使用容器混合材料。

B. 使用棍子搅拌材料。

C. 使用铲子混合材料。

A. The Emergency Procedures Section shall include at the beginning a check list with regard to order of action when sequence is essential to safety.

B. When the sequence of actions affects safety,a list of Safety Precautions should be provided at the beginning of an Emergency Procedure Section.

C. The sequence of actions is critical to flight safety,so a safety checklist should be provided at the beginning of an Emergency Procedure Section.

A. 有些功能不存在。

B. 有些功能不可用。

C. 有些系统不可用。