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NTSB handout file photo shows an investigator looking at the the wreckage of Asiana Airlines Flight 214 that crashed at San Francisco International Airport

A National Transportation Safety Board (NTSB) investigator looks at the tail section of the Asiana Airlines Flight 214 that crashed at San Francisco International Airport in San Francisco, California in this handout file photo released on July 7, 2013. Pilots of the Asiana Airlines Inc plane were aware the plane was traveling too slowly and tried to correct it in the final seconds before impact, according to documents released on December 11, 2013 by U.S. aviation safety investigators. REUTERS/NTSB/Handout via Reuters/Files (UNITED STATES - Tags: TRANSPORT DISASTER) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS

Asiana Airlines Flight 214 crash

Yahoo News

Pilot mismanagement and confusion caused Asiana Flight 214 to crash in San Francisco last year, U.S. accident investigators concluded Tuesday.

The National Transportation Safety Board said there was confusion over whether one of the airliner's key controls was maintaining speed.

The agency also cited the complexity of the Boeing 777's autothrottle and pilot training by the South Korea-based airline as contributing to the crash, which killed three passengers and injured more than 200.

(AP)

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