“Going to the Second Engine” is a euphemism for having to take a bowel movement. Most railroaders don’t want to do that in the ‘lead’ engine because that’s what they’re cooped up in for 12 hours or more a day. Makes sense in a way, but at this point, it wasn’t a very good time and the CSX dispatcher lets the crew know what he thinks about it. For those who aren’t from America, “Going on the Law” means the hours of service law is about to be applied. Once a crew hits 12 hrs, they need to safely bring the train to a stop and it cannot move until a new crew replaces the original.
According to the NTSB. Looks like Uncle Pete (Union Pacific Railroad) dropped the ball here and it cost lives.