Sabotage of the brakes?
“Sabotage of the brakes?”
Probably what they call a “Hot Box”. They have Hot Box detectors along the line out here. When axle bearings go bad they they catch on fire and light the car car up if they don’t know about it. This is why they used to have Cabooses, but they got rid of cabooses many years ago.
But they ignore the Hot Box detectors and go on to the next location where they can drop the box/car. Watched many burn up. And I have called many in to the rail dispatcher only to have them just keep going because the dispatcher would not let them stop. So this is the error of the whole rail company system from top down.
But they will blame it on operator error. They always do.
Some of those small houses along the rail line are "hot box detectors", which spot those failures when they go by. They send a message that identifies which car and which axle has failed.
Those trains don't always make it to the next stop before the failure causes the car's "truck" to fall apart.