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Cascades Derailment
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[QUOTE]Originally posted by Vincent206: [QB] The NTSB's [URL=http://file:///C:/Users/Daniel/Documents/RAR1901%20dupont%20crash.pdf]final accident report [/URL] was released today. There are more details in this report but the main narrative remains the same. This was the engineer's first trip over the territory with a revenue passenger load; he was in a locomotive that he was unfamiliar with; he saw the 2 mile marker but somehow missed the 1 mile marker; about 30 seconds before the train approached the 30 mph restricted curve an overspeed alarm sounded that distracted the driver until it was too late to slow down the train. The train entered the curve at 78 mph and derailed. Three passengers were killed and dozens were injured. The most significant addition I noticed was the risk analysis chart prepared for the 30 mph curve by Sound Transit. ST clearly understood the danger the curve posed. Their risk analysis rated the danger as "Unacceptable" but their mitigation plan was wholly inadequate, particularly without active PTC on the line. The mitigation plan also failed to include any input from the engineers. Another point of failure was the placement of the 2 mile warning sign. Amtrak's foreman of engines told the NTSB: [QUOTE]“An advanced speed board doesn’t really have any effect on their operation because it’s just too far out…to be of any use to them for braking for a curve 2 miles away.” [/QUOTE]A 2 mile warning might be useful for an engineer with a heavy freight train but for a light weight passenger train, 2 miles is too far out to be helpful. Unfortunately, the markings at 1 mile out were too inconspicuous to be noticed by either the engineer or the qualifying conductor who was riding in the lead locomotive. Like so many accidents, this was a combination of several lapses that individually wouldn't lead to disaster, but the unforeseen consequences of one mistake combining with another mistake led to a disaster that no one would have predicted. [/QB][/QUOTE]
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