November is a long ways off, and the exact aircraft used can be switched even at the last minute. You could call TAM in the U.S. at 1888 2 359826, but even if they did say what aircraft is used today, and how often models change (if at all), I'm sure they won't commit for a November flight. Also look at reviews on www.airlinequality.com and see if any recent reviews mention whether they were on a new 777-300. You might look at reviews periodically and see what's mentioned.