Additional weight and balance and related information may be provided.

A. 机身制造商将非必要项目作为手册的一部分，要提供选择说明。

B. 包含信息的部分手册，作为对非复杂项目的说明提供给机身制造商。

C. 对于其余非复杂项目，机身制造商将把信息作为手册的一部分。

A. 使用力矩扳手间隔拧紧螺栓。

B. 使用扭力扳手按顺序拧紧螺栓。

C. 使用扭矩扳手逐步拧紧螺栓。

A. L1 entry door life vests were not installed by flight crew.

B. Life vests at L1 entry door flight crew station not install.

C. Life vests were not installed at L1 entry door flight crew station.

A. Make sure that the warranty life of the material is not expanded.

B. Make sure that the retirement period of the material is not exceeded.

C. Make sure that the shelf life of the material is not expired.

A. 加油软管不能碰到油箱的边缘。

B. 加油软管不必碰到油箱的边缘。

C. 加油软管应该固定在油箱的边缘。

A. 溶剂不可以用来保护呼吸装置。

B. 不要在没有呼吸保护措施的情况下使用酸液。

C. 如果发现无呼吸，尽快使用保护设备。

A. The section of the engine which contains the sleeve, master and link rod assemblies, cams, cam drive gears, tappet guides, rollers, carriers, etc.

B. The section of the engine which contains the crankshaft, master and link rod assemblies, cams, cam drive gears, tappet guides, rollers, carriers, etc.

C. The section of the engine which contains the crankshaft, master and manifold assemblies, cams, cam drive gears, tappet guides, rollers, carriers, etc.

A. 将钢索穿过导管至客舱地板下方。

B. 安装钢索，将其穿过座舱地板下方的导管。

C. 通过驾驶舱地板下方的导管安装线束。

A. Fuel sample was checked for contamination of microorganism.

B. Contamination to microorganism was detected in the fuel sample.

C. Fuel sample check reveals positive contamination of microorganism growth.

A. Make sure the text is not so abstruse and that it clearly shows how to do a task or how a system operates. Be practical. Do not give vague, general information.

B. Make sure the text is not abstract and that it clearly shows how to do a task or how a system operates. Be specific. Do not give vague, general information.

C. Make sure the text is not so theoretical that it clearly shows how to do a task or how a system operates. Be concrete. Do not give unclear, general information.