271、Airworthiness Directive is procedure that must be used when performing maintenance on an aircraft

1218、Solenoid valves shall be shown with a notation indicating whether the valve is spring-loaded to the open or closedposition.

1217、The subject matter including optional information , of this section of the handbook shall conform to the followinggeneral order of presentation unless a different order is more suitable for a particular airplane.

1216、在大翼除冰系统安装伸缩管。

1215、If the components fall, permanent damage can occur.

1214、Visually examine the assembly to determine extent of damage.

1213、根据制造商的选择 o 静压系统的描述和讨论可以结合第 7.49 段的皮托管压力系统。

1212、The AFDS consists of three separate autopilot. Channels and a single Mode Control Panel.

1211 、 This manual provides the basic control and operation information describing how the airplane components arecontrolled and how they operate, including any special procedures, and limitations that apply.

1210、Do not refuel the aircraft during maintenance.

1209、Make sure that there is tension in the lockwire.