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单选题
运营人有责任确保所有适航指令得到遵守，并在需要时按照联邦航空法规对飞机进行操作、勤务和维修。
A
The airline operator is irresponsible for ensuring that all airworthiness instructions are complied with and that the handling, servicing and maintenance of the airplane is done when required and according to the Federal Aviation Regularities.
B
The operator is responsible for ensuring that all airworthiness directives are observed and that the handling, servicing and maintenance of the airplane is done when required and in accordance with the Federal Aviation Regulations.
C
The operator has the duty ensuring that all airworthiness directives are compiled with and that the handling, servicing and maintenance of the airplane is performed when needed and in accordance with the Feudal Aviation Regulations.
答案解析
正确答案：B
相关知识点：
运营人需确保遵守适航指令
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