Mandatory airworthiness information (Airworthiness Directive).

强制适航信息（适航指令）；

youdao

Be in charge of evaluating and dealing with the airworthiness directive in its domain.

负责评估处理专业范围内的适航指令。

youdao

Be in charge of evaluating and dealing with the airworthiness directive in its domain.

负责评估处理专业范围内的适航指令。

youdao