949、most secondary structures are important to the performance of the airplane

324、 To prevent unwanted friction, polish the surface.

323、 将所有装有不同金属螺套或有较深盲孔的金属零件在烤箱中干燥至少一小时,烤箱温度为 225 到 275
华氏度(107 to135C).

322 、 In 1944, the British Civil Airworthiness Requirements was developed to form the code of the Airworthiness Standards through which the requirements of the Air Navigation, Orders and Regulations would be met.

321、Tighten the bolts manually if you cannot do it with the specified tool. 如果不能使用指定的工具手动紧固螺栓。

320 、 This Section should contain a recommendation that airplane operator establishes contact with the
dealer or certified service station for service and information.

319、 The valve flaps are semicircular.阀瓣是半圆形的。

318. illustrations showing location of attachment points, turning radius shall be included.

317、为了在预处理空气连接单向阀在打开位置不工作时放行飞机,执行以下步骤。

316、 将探头移至下游,再次监测温度。

315、This procedure points out that the FAA should be contacted prior to any alterations on airplane to
ensure that airworthiness of the airplane is not violated.