Originally Posted by Goldorak

Seatguru is completely outdated for AF configs, so do not consider this as a reliable source. And I will have trouble to give you any link for your specific config of tonight. Indeed, it is a temporary config AF has during the summer, called "Quick Change". The principle is that, during the summer holidays period, there are less J bookings and more Y bookings. So they remove several rows of J and install Y seats instead. This gives a strange config with J, then Y, then W and finally the main Y cabin. But if you want to check the W and main Y cabin maps, you can in fact look at the "regular non-quick change" of the same plane, because the W and main Y cabins don't change. So, look at this thread :
http://www.flyertalk.com/forum/air-f...-schedule.html
Open the wiki at the top of the thread, scroll down until the cabin maps and your config (for W and the main Y cabin) will be the 2nd one displayed (called "Boeing 777-200ER 280 seats or 316 seats "quick change" J-W-Y with new cabins"). Row 23 is the first row of Y (bulkhead).