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单选题
适航指令规定的纠正措施，比如检查、修理或改装的具体要求，可由适航指令详细给出，或包含在另外一个文件中，如制造厂服务通告，该服务通告刊登在适航指令中作为参考。
A
AD describes corrective action, e.g. inspection, repair or maintenance, which may be listed by AD or included in another document, e.g. manufacturer＇s Service Bulletin that acts as reference in the AD.
B
The corrective action prescribed by the AD, such as an inspection, repair, or modification, may be detailed in the AD itself or may be contained in another document, such as manufacturer＇s Service Bulletin, which is referenced in the AD.
C
AD details the requirements for inspection, repair or modification described in corrective action, or it may be contained in another document, such as Service Bulletin referenced in AD.
答案解析
正确答案：A
相关知识点：
适航指令纠正措施要求
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