271、Airworthiness Directive is procedure that must be used when performing maintenance on an aircraft

A. 　如燃油面涨到通气油箱高度,则燃油将从通风口中排出。

B. 　如燃油水平在通气油箱有充足高度,则燃油将从通风扇中排出。

C. 　如燃油油位在通气油箱中足够高,则燃油将从通风扇中排出。

A. 　 The manufacturer shall include a descript ion of the type service information issued by、 the manufacturer
and the office or department to contact to get such information that the aircraft may be maintained in
accordance with the latest information.

B. 　 The manufacturer shall include a description of the type service information issued by the manufacturer
and the office or department to contact to obtain such information sol that the aircraft may be maintained in
accordance with the latest information.

C. 　 The factory shall include a description of the type service information issued by the manufacturer and the
office or department to contact to obtain such information so that the aircraft may be maintained related to
the latest information.

A. 　 转动凸轮以使显示器松脱

C. 　转动把手以使显示器不再显示

A. 　前面的每本手册都应该提供有效页清单

A. 　本节必须规定型号合格证所要求的每次强制更换时间,结构检查间隔,以及相关的结构检查程序

B. 　本节必须规定每一次强制更换时间,结构检查间隔,和机型证书所要求的相关的结构检查程序

C. 　本节必须规定部件更换的时间,结构检查时间,和相关的结构检查程序所需的型号合格证

A. 　松开断路测试开关

B. 　复位短路测试开关

C. 　松开短路测试开关

A. 　下一个检查内容是基于本次检查结果。

B. 　下一次检查间隔是基于本次检查结果。

C. 　下一次检查重点是基于本次检查结果

A. 　 use a degreasing agent to remove oil and grease

B. 　 Draw oil and grease from a degreasing agent

C. 　 Add oil and grease into a degreasing agent

A. 　 Do not make the pressure became less than (or more than)20 psi.

B. 　 Do not let the pressure become less than (or more than)20 psi.

C. 　 Do not let the pressure close less than (or more than) 20 psi.

A. 　 Do not give vague, general information.

B. 　 Do not provide clear, general information.

C. 　 Do not list complex, valid information.