You've GOT to be kidding me! I'm flying on flight 952 IAD-FRA on 25 Nov in C. Talk about crappy timing!
I guess that they're sending it out to SFO maintenance to fix any issues. I'm surprised that they don't send the SFO maintenance out to IAD for any issues.
As a United employee on military leave of absence, I have access to the booking information. It was originally supposed to be the new aircraft, but it got subbed out sometime this last week for the old configuration. The return flight on the 26th shows the old equipment also.
What a bummer.