但在飞行途中，也就是马航飞机失联的时段，普遍认为是最安全的。根据一份波音公司的分析，只有9%的致命事故发生在巡航高度。
"Cruise is generally a pretty good place," says David Ison, assistant professor at Embry-Riddle Aeronautical University, who was a transport pilot with international and transoceanic experience. "There's stable conditions. The weather at higher altitudes is generally better. The only issue is turbulence and sometimes thunderstorm activity."
飞行总是存在风险，但人们普遍认为飞机在较高的高度巡航的阶段是安全的。因此马航MH370的失联才如此让人迷惑。
"Whatever happened happened quickly and resulted in a catastrophic departure from the air," Mark Rosenker, former chairman of the National Transportation Safety Board who is now a consultant with CBS news, told NPR's Me Foundation, said in an email.
这家马航波音777飞机在10天前刚刚检查过，而且据称状况良好。波音777是一种远程飞机，普遍认为安全性很高。从20xx年投入使用以来只发生过60次事故。
Takeoff and landing are typically the riskiest portions of the flight. A Boeing 777 operated by Asiana Airlines was involved in the crash at San Francisco Airport last year that killed three people.
起飞和降落通常是飞行过程中最危险的两个时段。一家韩亚航空的波音777去年在旧金山机场降落时就发生了事故，造成3人死亡。
But the en-route portion of the flight, which the Malaysian Airlines flight was on, is seen as the safest. According to a Boeing analysis, only 9 percent of fatal accidents occur at cruising altitude.
埃姆伯里-利德尔航空学院的助理教授大卫·艾森说，“巡航通常是一个非常不错的阶段”。艾森曾经是一名运输机飞行员，有过国际以及跨洋飞行的经历。“这个阶段条件很稳定。高度越高，天气状况通常越好。的问题是气流，偶尔会有雷暴活动。”
马航飞机失联原因飞行中可能会遇到的问题
There's always a risk in flying, but the phase in which a plane is cruising at high altitude is widely considered to be safe. And that's what makes the mystery of what happened to so confounding.
由压力导致的飞机结构性疲劳斯在一封电子邮件中说，他现在运营着航空安全基金会。
The Malaysian Airlines Boeing 777 was last inspected just 10 days ago and was said to be in proper condition. The 777is a long-haul aircraft that is regarded as safe. , it's had about 60 incidents since it entered service in 1995.