2021.02.23 13:11
ユナイテッドのＢ７７７、エンジン羽根に金属疲労の特徴＝ＮＴＳＢ
米運輸安全委員会（ＮＴＳＢ）のサムウォルト委員長は２２日、ユナイテッド航空のボーイング７７７─２００型機で２０日に起きたプラット＆ホイットニー（Ｐ＆Ｗ）製エンジンの損傷について、初期評価では金属疲労の特徴と合致するとの見解を示した。
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