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<P mce_keep="true">I'm curious to know if there was ever a final, definitive answer regarding the investigations into the cause of the Amtrak derailments involving the SDP40 locomotives?  I know they were retired from service after it was suspected that the excessive lateral sway may have been a contributing factor in rail being spread (causing some railroads and later the NTSB to impose speed restrictions).  From what I can discern from the information I've read so far, they seem to have thought the internal design created a higher center of gravity that lead to the swaying on the less-than-excellent-condition ROWs.</P> <P mce_keep="true">Has any definitive answers been reached?  Maybe after the units were replaced by F40PH's the matter was considered resolved?</P>
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