WASHINGTON -- The investigation into the crash of American Airlines Flight 587 in New York last year indicates the co-pilot jammed the plane's rudder in different directions five times, setting up aerodynamic forces that tore off the vertical tail section.
But after a yearlong probe into the crash that killed 265 people Nov. 12, investigators still do not know why he would have done it. Nor are they close to saying that what he did was fully his fault, according to numerous sources connected to the investigation.
At a four-day hearing beginning Tuesday, the National Transportation Safety Board will explore the many questions that remain in one of its most complicated investigations.
It is delving into questions of the mind and questions about how air moves, how pilots are trained, how airplanes are made and how governments certify them as safe.
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