1257、If the filters become clogged after an unusually short time, send them to the laboratory for analysis of the contamination.

231、要了解更多信息，请参阅官方的参考书。

230、lf you do not install the rigging pin, the elevators will move down when there is no pressure in thesystem. 如果不安装索具销，电梯将在系统没有压力时向下移动。

229、These words will be very difficult to understand for people from outside of this area.

228、Make sure that the warning light comes on in less than 3 seconds. 确保警示灯在 3 秒内亮起

227、Aircraft equipped with tail wheels are generally towed forward by attaching the tow bar to the mainlanding gear. 装有尾轮的飞机通常是通过将牵引杆固定在主起落架上向前牵引。

226、手册是以带有耐用封面的活页形式还是以永久装订好的形式呈现由制造商来决定。

225 、 Pilots operating aircraft of other than U.S. registry should refer to the regulations the country ofcertification for information on preventive maintenance that may be performed by pilots.

224、lf the vocabulary, meanings of words, and the types of sentence constructions in a text are controlled, the variation between texts will be minimal. 如果控制了文本中的词汇、单词的含义和句子结构的类型，文本之间的变化将是最小的。

1055 、 CAP supplements the airplane’s maintenance manual (or instructions for Continuing Airworthiness)which is the primary document containing the procedures for the continuing airworthiness of the airplaneCAP 补充了飞机的维修手册(或持续适航说明)，后者是载有飞机持续适航程序的主要文件

223、手机的前面板有触摸屏和主页键。