Last time #6 borrowed an engine from Union Pacific, they left it behind in Denver. Apparently, Amtrak decided they only needed it the mountains and not in the plains. Of course, it probably depends on how much isn't working on Amtrak's units before that decision is made.
Thanks Tom! I straightened out the photo but then lost cell signal after Helper The conductor did say they were attaching the extra engine to "get us over the mountains" so I'm thinking you're right, they'll probably detach in Denver.
Turns out they kept the Union Pacific engine on after Denver. Based on the sound and the exhaust, it was the second P42, AMTK 177, that was "under performing." Did they ever say exactly what went wrong?
I'm new here and checking things out. Just wanted to say that I think it's SO COOL how you guys keep track (no pun!) of the trains like this. Excited to keep poking around. Very neat stuff here on this forum.