联邦航空管理局(FAA)发布安全警报,要求航空公司检查旗下的波音737
900ER飞机,原因是这款机型同样装有内嵌式舱门,设计与较早前舱壁飞脱的737 MAX 9相同。
《纽约时报》报道,FAA在21日晚上表示,737-900ER虽然属于上一代机型,和737
MAX不同,至今其内嵌式舱门也未出现问题,但基于相关设计一样,航空公司为了安全起见,应安排维修人员马上检测,确保舱门固定在正确位置。
根据波音公司的资料,内嵌式舱门共有4颗螺丝,其中两颗位于舱门上方,余下两颗位于下方铰接支架,共同将舱门固定封闭,若航空公司采用座位更加紧密的配置,飞机需要因应乘客人数,舱门可以改建为紧急出口。在2007至2019年间,波音向全球交付约500架737-900ER机型,但并非全部飞机都安装这种内嵌式舱门。
按照FAA的纪录,所有737-900ER已经飞行400万个周期,累计时间超过1100万小时。而在这次安全警报发出后,波音表示全力支持FAA和航空公司检查飞机。机队中均有737-900ER的阿拉斯加航空(Alaska
Airlines)和联合航空(United Airlines)表示,已开始检查同型号飞机,达美航空(Delta
Airlines)则说,已采取积极措施检查737-900ER机队。
阿拉斯加航空一架波音737 MAX
9型客机,本月初飞行期间舱壁飞脱。国家运输安全委员会(NTSB)事后发现,松脱的内嵌式舱门未有固定。FAA旋即宣布所有MAX
9飞机停飞,并且调查波音有否确保飞机安全。
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