双语新闻：美联航发现多架737 MAX飞机螺栓松动

United Airlines says it has found loose bolts on multiple grounded Boeing MAX 9 aircraft.

美国联合航空公司表示，在多架停飞的波音MAX 9飞机上发现螺栓松动。

U.S. regulators grounded 171 of the 737 Max 9 aircraft after a panel blew off a plane operated by Alaska Airlines.

美国监管机构停飞了171架737 Max 9飞机，此前一块面板炸毁了阿拉斯加航空公司运营的一架飞机。

The incident happened shortly after the plane's take-off from an airport in Portland on Friday, forcing pilots to scramble to land the plane safely.

这起事件发生在周五飞机从波特兰机场起飞后不久，迫使飞行员匆忙将飞机安全降落。

United Airlines said its inspections found bolts that needed tightening on several panels.

美国联合航空公司表示，其检查发现几个面板上的螺栓需要拧紧。