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MH370失踪最可能原因:缺氧致机组人员失去意识

2014-07-01    来源:theguardian.com    【      美国外教 在线口语培训

概要:据英国《卫报》6月26日报道,马航失联航班MH370的搜索人员认为,飞机缺氧导致机组人员失去意识是这架航班消失的最可能原因。

澳大利亚运输安全局(ATSB)的报告指出,飞行模式的卫星数据显示,飞机可能发生了减压和缺氧,导致飞行员不省人事。澳方还表示,通过技术分析发现,MH370的1到7段飞行航路连续,因此飞机坠海前“很有可能”处于自动驾驶状态。

MH370的失踪与2005年8月14日塞浦路斯太阳神航空公司的航班事故极为类似。根据调查报告,那架航班的飞机工程师做完机舱加压测试后忘记把加压掣从手动模式变回自动模式,飞行员未有察觉。飞机升空后气压下降,飞行员失去意识,飞机在自动飞行两小时后撞上了雅典北部25英里(约40公里)处的一座山。

澳大利亚26日举行发布会,宣布MH370的最新搜索区域,该搜索区域将向西南延伸,预计搜寻工作要用上一年左右的时间。

Flight MH370 investigators consider oxygen starvation as cause of disappearance

Plane on 'autopilot before crash', with course pointing to likely depressurisation and hypoxia rendering crew unconscious

Investigators searching for flight MH370 consider a catastrophic event leading to oxygen starvation the most likely scenario in the disappearance of the Malaysian Airlines Boeing 777.

The Australian-led search team say that the plane was flying on autopilot on a consistent course when it finally crashed into the ocean when its engines flamed out.

The search team stressed that this was only a working assumption – rather than any cause identified by accident investigators under the legal lead of the Malaysian government. But a report from the Australian Transport Safety Bureau (ATSB) said that of the classes of accidents that appeared relevant, satellite data of the flight pattern pointed to likely depressurisation and hypoxia rendering the crew unconscious.

It says the loss of MH370 most resembles flights including the Helios Airways "ghost flight" of 2005, which flew for two hours on autopilot after air pressure dropped and its pilots lost consciousness before crashing into a mountain 25 miles north of Athens.

Chief commissioner of ATSB, Martin Dolan, said it was "highly, highly likely" that MH370 was on autopilot for hours before it crashed, because of the orderly path the plane took.

The assumptions have been made as investigators redefine the search area for the plane further south in the Indian Ocean. Searchers will spend three months mapping previously uncharted waters before a detailed underwater search can take place.

The Australian deputy prime minister, Warren Truss, announced the search for flight MH370 off Western Australia had moved further south and was still about 1,100 miles (1,800km) offshore.

An expert satellite working group defined a new search zone of up to 23,200 sq miles (60,000 sq km) along the arc in the southern Indian Ocean in the hunt for the plane which has so far been fruitless.

Mapping the new search area, through Chinese and Australian ships, is expected to take three months. The next stage has been given a provisional 12 month duration, although investigators have admitted it could last far longer.

Authorities are still confident the Malaysian Airlines plane is off Australia's west coast. Truss added: "Specialists have analysed satellite communications information, information which was never initially intended to have the capability to track an aircraft, and performed extremely complex calculations.

"The new priority area is still focused on the seventh arc, where the aircraft last communicated with satellite. We are now shifting our attention to an area further south along the arc based on these calculations."



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