According to DL's (AF partner) website, DL operates a 777-200 from CDG-CVG until March 2002, then goes to a 767-300. At the beginning of the summer, AF adds its own 767-300 to that route. That's according to the website now, and since our trip isn't until May 2002, it'll probably change again before then... I'm hoping that AF will put one of its new A330-200's on that route, as they are doing to some of their 767-300 routes such as BOS and YYZ. I'll just have to wait, I suppose.
I got a bit off the subject there, didn't I?
But apparently, all airlines change their a/c unexpectedly, and I would guess that most passengers don't care. (Too bad that for me, the aircraft type is the only reason I fly!)