Those units and components which furnish a means of supporting and steering the aircraft on the ground or water, and make it possible to retract and store the landing gear in flight. Includes brakes, wheels, floats, doors, shock struts, tires, linkages, position indicating and warning systems.

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. If you use cleaner in a closed space, make sure that there is ventilation in the work area.

B. Ensure that there is adequate airflow in the work area when using solvent in an enclosed space.

C. If you use solvent in a confined space, make sure that there is restricted airflow in the work area.

A. 通过最少两个全循环操作副翼，并操作至其最大行程。

B. 至少完整操作副翼两个全循环至其最大行程。

C. 操作副翼最小两个单位，至其最大行程。

A. 如果微型开关不可用，则起动作动筒以防止损坏活门。

B. 如果微型开关不可用，则执行作动筒的限动程序以防止损坏活门。

C. 如果微型开关适用，为了防止损坏活门对作动筒执行拆下的步骤。

A. Aluminum wire should not be attached to engine mounted accessories or used in areas having corrosive fumes, severe vibration, mechanical stresses, or where there is a need for frequent disconnection.

B. Aluminum line should not be connected to attachments which are mounted on the engine and also not be applied in domains where corrosive gases, serious oscillation, mechanical forces exist or where it is necessary to disconnect frequently.

C. Aluminum cable should not be linked to accessories installed on the engine. It should also not be used in the event of corrosive fumes, serious vibration, mechanic loads or the place where frequent disconnections are required.

A. The troubleshooting section includes Description and Operations.

B. Contents of Troubleshooting section should be prepared under "Description" and "Operations".

C. Material of Description and Operation is the critical contents to troubleshooting section.

A. 《飞行员操作手册》的本节应包含FAR（或其他适用法规）和本规范要求的所有绩效信息。

B. 《飞行员操作手册》的此节内容应包含FAR（或其他适用规章）和本规范要求的所有性能信息。

C. 《飞行员操作手册》的这一节内容应包含FAR（或其他适用条例）和本规范要求的所有参数信息。

A. 结构类别分为三类：主要的、次要的、备用的。

B. 结构类别分为三类：主要的、次要的、必需的。

C. 结构类别分为三类：主要的、次要的、第三位的。

A. To simplify the overall master wiring diagram to make it easy to understand, complex systems should be described in terms of functional interconnections.

B. The overall master wiring diagrams are too complex to be understandable, so the presentation of the systems shall be simplified and the interconnections should be plainly noted.

C. To make the wiring diagrams simplified and understandable, the complex systems should be described in system-functions. The connection of each system shall be presented clearly.

A. Let the plate dry at applicable temperature.

B. Let the plant dry at available temperature.

C. Let the paint dry at ambient temperature.