适航指令 ad airworthiness directive; airworthiness directives; cad 折航指示钟 zigzag clock; zigzag control .
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ad airworthiness directive
AD适航指令
以上为机器翻译结果，长、整句建议使用 人工翻译 。
As a result of an in-flight, Boeing 787 battery incident earlier today in Japan, the FAA will issue an emergency airworthiness directive (AD) to address a potential battery fire risk in the 787 and require operators to temporarily cease operations.
ENGADGET: FAA grounds all US Boeing 787 Dreamliners after second lithium ion battery failure
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