Record all repairs to the skin surface.

A. If a supply shutoff valve was closed within five minutes, no maintenance performance is needed and shutoff periods are not accumulated.

B. Maintenance action is not necessary and shutoff periods are not calculated unless the shutoff valve was closed for less than five minutes.

C. When a supply shutoff valve was closed for five minutes, maintenance action is hardly required and shutoff duration are not included.

A. 发动机火警探测系统的传感器始终是一个双连续回路。

B. 发动机火灾探测系统的感应器是一个持续双环路设计。

C. 发动机防火系统内的传感器总是一个持续双循环。

A. Such tests or checks will be completed according to the conditions.

B. Such tests or checks will be very complex according to the conditions.

C. Such tests or checks will be different in complexity according to the conditions.

A. 使用多余的清洁剂清洁该区域。

B. 清除该区域多余的密封胶。

C. 在该区域内清理有害的密封剂。

A. 衬板的厚度应该是初始翼梁衬垫的厚度的1-1.2倍。

B. 加强条的厚度乘以1-1.2就得到初始长桁衬垫的厚度。

C. 压条的厚度应是初始长桁衬垫的厚度的1-1.2倍。

A. 燃油系统指发动机以外储存燃油、给发动机配送及输回燃油的装置和部件。

B. 滑油系统指那些储存滑油，并把滑油送往发动机以及从发动机回油的相关外部组件和部件。

C. 滑油系统指发动机内储存润滑油和运输润滑油的装置和部件。

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. 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. Apparently, the Supplement about the subject system or equipment, if installed, must be in the Pilot＇s Operating Handbook whenever applicable.

B. You shall know clearly that when the subject system or equipment is installed, the Pilot＇s Operating Handbook must always contain the related Supplement.

C. When the subject system or equipment is installed, you need to clearly identify the associated Supplement in the Pilot＇s Operating Handbook at all times.

A. 不要使钢索散开。

B. 不要使电缆扭结。

C. 不要使导线绞缠。