据美国政府联邦公报，美国联邦航空管理局（FAA）2月14日对波音公司的某些747-400、747-400F、747-8F和747-8系列飞机采用了新的适航指令（AD）。据报告，在饮用水维修过程中，发动机指示和机组人员警报系统发出了多条信息。

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