someone left an air brake on
HRA will be asking questions and someone will be pissing in a cup
If it's only one wheel, it probably stuck after they departed the originating terminal. No piss test. This was one of my arguments when I testified years ago at an FRA hearing about removing towers and tower operators. Operators would have seen the sparks coming from that wheel and stopped them long before it got that bad. That picture doesn't show the whole picture. Look at the distortion in the wheel. That got hot and was hot for a long time. That flange could have warped or broken off and then you'd have that train on the ground. Then there would be a piss test.