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2 Asiana crew 'thrown' from plane survive

10 July 2013, 15:02

San Francisco - Two flight attendants in the back of Asiana Airlines Flight 214 survived despite being thrown onto the runway when the plane slammed into a seawall and lost its tail during a crash landing at San Francisco's airport, the head of the National Transportation Safety Board (NTSB) said on Tuesday.

Chairperson Deborah Hersman also revealed that the pilots told investigators they were relying on automated cockpit equipment to control their speed during final approach, which prompts questions about whether a mistake was made in programming the "auto throttle" or if the equipment malfunctioned.

The South Korean airline's plane crashed when it came in too low and slow for landing. Hersman said the pilot at the controls was only about halfway through his training on the Boeing 777 and was landing that type of aircraft at the San Francisco airport for the first time ever.

And the co-pilot was on his first trip as a flight instructor.

Saturday's crash killed two teenage Chinese girls but remarkably 305 others survived, most with little or no physical injuries. A final determination on the cause of the crash is months away and Hersman cautioned against drawing any conclusions based on the information revealed so far.

Cockpit communication

Audio recordings show pilots tried to correct the plane's speed and elevation only until seconds before hitting the seawall at the end of the runway, a calamitous impact that sent the fuselage bouncing and skidding across the airfield.

Here is what is known: Seven seconds before impact, someone in the cockpit asked for more speed after apparently noticing that the jet was flying far slower than its recommended landing speed. A few seconds later, the yoke began to vibrate violently, an automatic warning telling the pilot the plane is losing lift and in imminent danger of an aerodynamic stall. One and a half seconds before impact came a command to abort the landing.

The plane's airspeed has emerged as a key question mark in the investigation. All aircraft have minimum safe flying speeds that must be maintained or pilots risk a stall, which robs a plane of the lift it needs to stay airborne. Below those speeds, planes become unmaneuverable.

Because pilots, not the control tower, are responsible for the approach and landing, former NTSB Chairperson James Hall said, the cockpit communications will be key to figuring out what went wrong.

"Good communication with the flight crew as well as the flight attendants is something I'm sure they're going to look at closely with this event," he said on Tuesday. "Who was making decisions?"

Understanding the problem

Hall was on the transportation board when a Korean Airlines Boeing 747 crashed in Guam in 1997, an accident investigators blamed in part on an authoritarian cockpit culture that made newer pilots reluctant to challenge captains.

Since then, the industry has adopted broad training and requirements for crew resource management, a communications system or philosophy airline pilots are taught in part so that pilots who not at the controls feel free to voice any safety concerns or correct any unsafe behaviour, even if it means challenging a more senior pilot or saying something that might give offense.

If any of the Asiana pilots "saw something out of parameters for a safe landing," they were obligated to speak up, said Cass Howell, an associate dean at the Embry-Riddle Aeronautical University in Daytona Beach, Florida.

"There are dozens and dozens of accidents that were preventable had someone been able to speak up when they should have, but they were reluctant to do so for any number of reasons, including looking stupid or offending the captain," said Howell, a former Marine Corps pilot.

There's been no indication, from verbal calls or mechanical issues, that an emergency was ever declared by pilots. Most airlines would require all four pilots to be present for the landing, the time when something is most likely to go wrong, experienced pilots said.

"If there are four pilots there, even if you are sitting on a jump seat, that's something you watch, the airspeed and the descent profile," said John Cox, a former US Airways pilot and former Air Line Pilots Association accident investigator.

Investigators want to nail down exactly what all four Asiana pilots were doing at all times.

"We're looking at what they were doing, and we want to understand why they were doing it," Hersman said on Monday. "We want to understand what they knew and what they understood."

Rescue review

It's unlikely there was a lot of chatter as the plane came in. The Federal Aviation Administration's "sterile cockpit" rules require pilots to refrain from any unnecessary conversation while the plane is below 30 400m so that their attention is focused on taking off or landing.

What little conversation takes places is supposed to be necessary to safely completing the task at hand.

Choi Jeong-ho, a senior official for South Korea's Ministry of Land, Infrastructure and Transport, told reporters in a briefing on Tuesday in South Korea that investigators from both countries questioned two of the four Asiana pilots, Lee Gang-guk and Lee Jeong-min, on Monday. They planned to question the other two pilots and air controllers on Tuesday.

Choi said recorded conversation between the pilots and air controllers at the San Francisco airport would be investigated, too.

In addition, authorities were reviewing the initial rescue efforts after fire officials acknowledged that one of their trucks might have run over one of the two Chinese teenagers killed in the crash.

The students, Wang Linjia and Ye Mengyuan, were part of a larger group headed for a Christian summer camp with dozens of classmates.

Pilots isolated

Asiana President Yoon Young-doo arrived in San Francisco from South Korea on Tuesday morning, fighting his way through a pack of journalists outside customs.

He said he will look at the efforts of airline employees to help injured passengers and their family members, visit with the NTSB and other organisations to apologise for the crash and try to meet injured passengers.

Yoon said he can't meet with the Asiana pilots because no outside contact with them is allowed until the investigation is completed.

Unauthorised interviews

The NTSB has lodged a complaint about a news conference given by the cabin manager on the flight. Asiana spokesperson Lee Hyomin said on Wednesday that a document from the NTSB cited cabin manager Lee Yoon-hye's description to reporters of the dramatic evacuation.

The Asiana spokesperson had no further details about the complaint.

The liberal Hankyoreh newspaper in South Korea reported on Wednesday that the NTSB warned Asiana not to hold more news conferences and demanded an English transcript of Lee's comments.

Hankyoreh didn't cite sources. It says Asiana plans to comply.

Hankyoreh says the NTSB told Asiana that publicity could affect public opinion during the investigation into what caused Saturday's crash.

More than 180 people aboard the plane went to hospitals with injuries. But remarkably, more than a third didn't even require hospitalisation.

The passengers included 141 Chinese, 77 South Koreans, 64 Americans, three Canadians, three Indians, one Japanese, one Vietnamese and one person from France.

South Korea officials said 39 people remained hospitalised in seven different hospitals in San Francisco.

The flight originated in Shanghai, China, and stopped over in Seoul, South Korea, before making the nearly 11-hour trip to San Francisco.

- AP


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