557.The rudder is used for yaw control,that is control of the aircraft around vertical axis.

A. When you restore the airplane to its normal condition,make sure the pin is released from the release mechanism.

B. Ensure to remove the pin from the let-go mechanism after you return from the airplane to its common position.

C. When the airplane is in good condition,you must uninstall the pin of the release mechanism.

A. During this period,if you use economy power settings,the engine may be damaged."

B. The use of economy power settings during this period may be detrimental to the engine life."

C. The use of economy power settings during this period may reproduce the engine life."

A. "Maintenance Practices" include servicing,removal/installation,adjustment/test,inspection/check,cleaning/painting,and approved repairs."Maintenance Practices" should obey the instructions of the Troubleshooting Section.

B. "Maintenance Practices" include servicing,removal/installation,adjustment/test,inspection/check,cleaning/painting,and approved repairs."Maintenance Practices" should be located after the Troubleshooting Section.

C. "Maintenance Practices" include servicing,removal/installation,adjustment/test,inspection/check,cleaning/painting.And approved repairs should be located after the Troubleshooting Section.

A. 所有增补内容都要发给手册所涵盖飞机机型持有人。推荐这种方法的原因是尽量减少配发的错误,也通知持有人系统和设备的可用性。

B. 所有增补内容都可以发给全部机型持有人。用这样的方法可以减少文件配发错误,同时也通知所有机型持有人飞机系统和设备的可用性。

C. 所有增补内容都仅发给当时的机型持有人。以此减少错误地配发多余文件,同事也是通知该机型持有人系统和设备的可用性。

D. B.所有增补内容都可以发给全部机型持有人。用这样的方法可以减少文件配发错误,同时也通知所有机型持有人飞机系统和设备的可用性。

E. C.所有增补内容都仅发给当时的机型持有人。以此减少错误地配发多余文件,同事也是通

F. C.所有增补内容都仅发给当时的机型持有人。以此减少错误地配发多余文件,同事也是通知该机型持有人系统和设备的可用性。

A. The basis for assuring an airplane remains airworthy and safe to operate is to combine the manufacturer's requirements with sound inspection and maintenance practices.

B. To ensure airworthiness and safe operation of an airplane,it is essential to follow themanufacturer's instructions in the utilization of airplane,and perform sound inspection and maintenance practices as well.

C. Airworthiness and safe operation are fundamental to aircraft utilization as required bythe manufacturer,so sound inspection and maintenance practices are carried out.

D. C.Airworthiness and safe operation are fundamental to aircraft utilization as required bythe manufacturer,so sound inspection and maintenance practices are carried out.

A. 正常俯仰控制法则基本上是负载系数的闭环控制,包括飞行发展保护。

B. 正常俯仰控制法基本上是负载厂家的闭环控制,包括飞行包线保护。

C. 正常俯仰控制法则基本上是负载系数的闭环控制,包括飞行包线保护。

A. 抛光表面,直到它非常有光泽。

B. 打磨表面,直到它非常薄。

C. 在表面非常薄之前润色它。

A. 组件的电流通过发动机提供给防冰系统。

B. 发动机产生的部分电能供给防冰系统使用。

C. 发动机的电力部件支持防冰系统。

A. 焊接时请带防护面罩。

B. 在焊接过程中,请使用保护罩。

C. 在焊接的程序中有使用防护屏的要求。

A. 这些 ALIs 是强制性的,未经负责飞机型号证书的 FAA 办公室或适用的监管机构的批准,不能更改或删除。

B. 这些 ALIs 是指令性的,未经 FAA 办公室批准不得更改或删除。FAA 办公室负责飞机型号证书,或发布适用的管理规章。

C. 这些 ALIs 是非常必要的,任何更改或删除必须获得 FAA 办公室批准,或者其他可以颁发飞机型号证书的监管机构的批准。

D. C.这些 ALIs 是非常必要的,任何更改或删除必须获得 FAA 办公室批准,或者其他可以

E. C.这些 ALIs 是非常必要的,任何更改或删除必须获得 FAA 办公室批准,或者其他可以颁发飞机型号证书的监管机构的批准。