「轉貼」Defense giant RTX (RTX), formerly Raytheon Technologies, topped expectations for its Q2 report early Tuesday. RTX stock tumbled following results as its Pratt & Whitney jet engine unit disclosed a defect.
https://www.investors.com/news/rtx-...0220&yptr=yahoo

RTX公司採用的「普惠」發動機出了毛病，以致於股價大跌。
https://zh.m.wikipedia.org/zh-tw/%E...%85%AC%E5%8F%B8

然而，我認為這是一時的問題，RTX體質沒受影響。另外，我相信「普惠」能處理發動機問題。