"Unscheduled Servicing" includes instructions such as those for ice and snow removal from parked aircraft, preoiling of radial engines after extended shutdown, etc.

A. 如有必要进一步减小钢索张力，可使用松紧螺套。

B. 如有必要进一步降低钢索张力，可使用张力计。

C. 如有必要进一步调节钢索长度，可使用旋转带子。

A. An annunciator device is displayed on the panel, which shows how it works.

B. If an annunciator panel is installed, explain how it operates.

C. If a display appears on the annunciator panel, it explains that how the system works.

A. 操作增压的系统时会导致人员受伤。

B. 对压力系统进行工作时会导致人员受伤。

C. 增压系统会导致正在工作的人员伤亡。

A. The revision dates need to be displayed at each revision location.

B. The revision date needs to be displayed in an obvious place.

C. The revision date should be displayed on every revision page.

A. If as many as 50% of the holes are contaminated, you should clean the display units behinds the holes.

B. The holes on the bottom of the display unit should be cleaned once over 50% of them are clogged due to contamination.

C. If contamination causes a blockage of more than 50 percent of the holes, then clean the holes on the rear of the display units.

A. 描述飞机加热、通风、除霜和空调系统时，应说明如何使用所提供的操纵系统获得最大效益。

B. 描述飞机加热、通风、除霜和空调系统时，应说明如何使用所提供的控制装置使这些系统能够获得最大效益。

C. 描述飞机加热、通风、除霜和空调系统时，应说明如何获得最大收益以便使用所提供的控制装置。

A. Outside air temperature is the free air static temperature, obtained either from temperature indications onboard or ground meteorological sources, adjusted for instrument error and compressibility effects.

B. Outside air temperature is the free air static temperature, acquired either from inflight temperature indications or ground geological sources, modified by instrument error and compression effects.

C. Outside air temperature is the free air static temperature, derived either from inflight temperature indicators or ground methodological sources, modulating instrument error and compressibility effects.

A. 拧紧松紧螺套，直到钢索达到合适的张力。

B. 松开再拧紧螺套，直到钢索有适当的张力。

C. 旋转螺套，确保钢索处于正确的位置。

A. 分配系统是指系统中用于将高压或低压空气分配到用户系统的那部分。

B. 分布系统是指系统中用于向正在运行中的系统分配高压或低压空气的那部分。

C. 配电系统是指系统中用于将高压或低压空气分配到有需求系统的那部分。

A. 作动时间必须在28至40秒之间，在某个方向作动电流不得超过0.5安培。

B. 指令要求作动时间必须在28至40秒之间，且作动电流不得少于0.5安培。

C. 在任何一个方向上作动的时间必须在28至40秒之间，且作动电流不得超过0.5安培。