February 7, 2017 | ABC News | A defective axle broke and caused a 2013 train derailment that led to a series of explosions just a quarter-mile outside a small North Dakota town, the National Transportation Safety Board said Tuesday.
A BNSF train carrying soybeans derailed and was struck by one carrying oil, setting off explosions near the small town of Casselton, about 20 miles west of Fargo. About 1,400 residents were evacuated from their homes. No one was hurt.
NTSB investigators said during a meeting in Washington that the flawed axle on the 45th car of the grain train could have been subjected to more thorough testing when its bearings and wheels were remounted at a BNSF shop in 2010. They said the axle wouldn’t have been returned to service if testing had found the defect, which was created when the axle was made by Standard Steel in 2002.