Air France most recent 747 delivery was 2005 - but that's a Freighter. Most recent 747-400 passenger was delivered in 2004 - shows over 50,000 hrs. and 6,300 cycles (which is pretty young considering many 747-400s are north of 100k hours). However that one actually belongs to ILFC, so presumably they'll take it back and either find another operator, or perhaps convert it to a freighter.
The 'newest' 747-400 passenger I could find that was originally delivered to AF and still in service was delivered in 1992 and currently shows nearly 105,000 hrs. I suspect it'll be headed for the desert to be 'recycled'.
