In all probability and according to news reports there were faulty wheels and wheel clattering in atleast one of the coaches which translates to poor maintenance by WR ...maybe that wheel got jammed and slipped off the tracks and other coaches followed..there is evidence as the LP said to jhs controllers of increased load (due to jamming) but they said to take the train to CNB...maybe they dont have wheel changing facility there...the RM nd DRM should take the moral responsibility that it cannot convince its staff to work with full dedication which led to poor maintenance leading to the accident