如果故障频繁发生，则进行系统测试。

A. The self-locking function decays after several removal and installation.

B. Repeated removal and installation causes the self-locking nut to lose its locking feature.

C. Avoid repeated removal and installation of the self-locking nut to protect its locking feature.

A. 给出了允许使用的动词，不要使用未列出的动词形式。

B. 动词以批准的表格列出,不要使用表中未列出的动词。

C. 给出了动词允许使用的形式。不要使用未列出的动词形式。

A. 异常程序部分在开始时应包括一份有关操作顺序的检查单，说明顺序对安全至关重要。

B. 异常程序部分应包括一份在开始操作时检查单，这样编写的顺序对飞行安全至关重要。

C. 当顺序对安全至关重要时，异常程序部分在开始时应包括一份有关操作顺序的检查单。

A. Turn the adjuster clockwise to increase 60 Deg.

B. Turn the adjuster counterclockwise in increments of 60 Deg.

C. Decrease 60 Deg. to turn the adjuster counterclockwise.

A. Do not smell the compound fumes.

B. Do not smell the solvent fames.

C. Do not breathe the solvent fumes.

A. “飞机性能”中的每一项均应对与数据相关的重要条件进行说明。

B. 每一项飞机性能都包含对重要条件和数据的说明。

C. “飞机性能”中的每一条目均应对数据及其重要条件之间的关联性进行说明。

A. 解除离合器可以防止启动发动机时发生意外。

B. 在启动发动机之前，脱开离合器。

C. 拆卸离合器，启动发动机。

A. If the cable twists, disconnect the two connectors.

B. If the wire bents, break the two connectors.

C. If the cable wire breaks, disconnect both ends of the connectors.

A. Air filter needs to be replaced on regular maintenance schedule, because it often causes low flow through the equipment cooling supply system. Quickly release the tabs on the air filter housing cover to reach the filters.

B. Low flow through the equipment cooling supply system is caused by a contaminated air filter, therefore regular replacement is necessary, release the quick release tabs on the air filter housing cover to approach to the filters.

C. A blocked air filter which causes low flow through the equipment cooling supply system needs replacement on a regular maintenance schedule. Release the quick release tabs on the air filter housing cover to reach the filters.

A. 描述飞机机翼襟翼、俯冲制动或扰流板系统时，应描述其应用如何影响俯仰姿态、空速、配平和失速速度。

B. 描述飞机机翼翼尖、俯冲制动或扰流板系统时，应描述其应用如何影响俯仰姿态、表速、配平和失速速度。

C. 描述飞机机翼襟翼、俯冲减速板或扰流板系统时，应描述各自工作时如何影响俯仰姿势、空速、配平和失速速度。