Following the November 11 took place first thing aircraft toilet block after the incident took place this month, another series of three similar incidents.
继11月11日发生了第一件飞机卫生间堵塞事件后，本月又接连发生了三起类似事件。
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It entered service in 1995 and the National Transportation Safety Board, which is responsible for monitoring US-made aircraft, has logged fewer than 60 incidents.
The aircraft maker saw its stock tumble as much as 7% at one point this week due to three separate technical incidents involving its relatively brand new 787 aircraft.