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Asiana Ntsb Preliminary Report


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Full Report: http://www.ntsb.gov/news/events/2014/asiana214/abstract.html

Probable Cause:

The National Transportation Safety Board determines that the probable cause of this accident was the flight crews mismanagement of the airplanes descent during the visual approach, the pilot flyings unintended deactivation of automatic airspeed control, the flight crews inadequate monitoring of airspeed, and the flight crews delayed execution of a go-around after they became aware that the airplane was below acceptable glidepath and airspeed tolerances. Contributing to the accident were; (1) the complexities of the autothrottle and autopilot flight director systems that were inadequately described in Boeings documentation and Asianas pilot training, which increased the likelihood of mode error; (2) the flight crews nonstandard communication and coordination regarding the use of the autothrottle and autopilot flight director systems; (3) the pilot flyings inadequate training on the planning and executing of visual approaches; (4) the pilot monitoring/instructor pilots inadequate supervision of the pilot flying; and (5) flight crew fatigue which likely degraded their performance.

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