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路透华盛顿10月8日 - 美国联邦航空管理局周二向航空公司发出安全警报，警告某些波音737飞机的方向舵运动可能受限或卡住。
上周，美国国家运输安全委员会（National Transportation Safety Board (link)）称，40多家波音 737飞机的外国运营商可能正在使用的MAX或737下一代飞机的方向舵部件可能存在安全隐患。
在今年2月美国联合航空公司 一架航班发生事故后，该委员会于9月26日发布了紧急安全建议 (link)，并敦促美国联邦航空局就一些737飞机的方向舵控制系统可能被卡住的问题采取行动。
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