仅事实
美国监管机构确认波音燃油开关在印度航空坠机事件后安全
Summary
美国联邦航空管理局表示，波音飞机燃油控制开关是安全的，此声明是在对6月造成260人死亡的印度航空坠机事件的初步调查之后发布的。
美国联邦航空管理局（FAA）表示，不认为波音飞机的燃油控制开关存在安全隐患，此前有报道称该开关与6月一起导致260人死亡的印度航空航班坠机事件有关。印度飞机事故调查局（AAIB）发布的初步调查报告发现，波音787-8梦想飞机的发动机燃油在从艾哈迈达巴德起飞后不久被切断，控制燃油流动的开关从“运行”位置被移至“切断”位置。
AAIB报告引用了2018年FAA的一项建议，该建议推荐但未强制运营商检查燃油切断开关的锁定功能，以防止意外移动。根据AAIB的说法，印度航空未进行此项检查。FAA在一份内部说明中表示，虽然燃油控制开关的设计和锁定功能在多个波音机型中相似，但“并不认为这一问题构成任何波音飞机型号（包括787型号）需要发布适航指令的不安全状况。”
调查人员审查的驾驶舱语音记录显示，飞行中一名飞行员询问另一名飞行员为何燃油被切断，后者回答称自己并未操作。AAIB表示，开关在起飞后几乎同时被移至切断位置，但报告未确定具体原因。印度航空首席执行官提醒不要从初步调查结果中得出过早结论。
来源
BBC事实核查
使用外部来源和数据库核实文章的事实。
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The June crash of an Air India flight resulted in 260 deaths.
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The preliminary investigation, released by India's Aircraft Accident Investigation Branch (AAIB), found that fuel to the Boeing 787-8 Dreamliner's engines was cut off shortly after take-off from Ahmedabad.
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The AAIB report referenced a 2018 FAA advisory that recommended, but did not require, operators to inspect the locking feature of the fuel cut-off switches to prevent accidental movement.
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According to the AAIB, Air India had not performed this inspection.
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In an internal note, the FAA stated that while the fuel control switch design and locking feature are similar across several Boeing models, it 'does not consider this issue to be an unsafe condition that would warrant an Airworthiness Directive on any Boeing airplane models, including the Model 787.'
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