美国航空一架波音777因故障折返北京

An American Airlines Boeing 777 airliner returned to Beijing Capital International Airport this morning after a mechanical malfunction was suspected shortly after it took off from the airport.

美国航空公司的波音777客机今天早上从机场起飞后不久因被怀疑机械故障返回北京首都国际机场。

The Flight AA186 from Beijing to Chicago took off at 10:36am after a 20-minute delay but returned to the airport at 10:54am.

这趟从北京到芝加哥的AA186航班在20分钟的延迟后于上午10:36起飞，但在上午10:54返回机场。

Witnesses said several ambulances surrounded the aircraft and sprayed foaming water on the undercarriage on the runway after its landing.

目击者说几辆救护车包围了飞机，着陆后在跑道上给飞机起落架喷洒泡沫水。

A source with the airport told Beijing media that the captain noticed a problem with the engines after takeoff and asked to return to the airport.

机场消息人士告诉北京媒体机长起飞后注意到发动机有个问题，要求返回机场。

Since the airliner's fuel tanks were filled at the time of the emergency landing, the captain had to use full brakes to slow it down on the runway and firefighters had to cool down the wheels with water, experts said.

因为紧急着陆的时候飞机的油箱是满的，机长必须在跑道上全力刹车使其慢下来，消防队员不得不用水冷却轮子，专家说。

The cause of the incident was still under investigation.

事故的原因仍在调查之中。

The B-777 was the model of plane involved in the crash landing of the Asiana Airlines Flight 214 in San Francisco in the United States on Saturday. Two Chinese students were killed while another is still in critical condition.

波音777客机模型与星期六在美国旧金山坠毁的韩亚航空公司214航班有关。两名中国学生遇难而另一个仍情况危急。