I just booked my family on flights from the US to New Zealand using AAdvantage miles, and have received paper tickets. The fare codes for the LAX-AKL via Papeete segment is Z, which I thought was Business class, but the itinerary listed at the front of the ticket clearly states Coach. I just called American and they assure me that Z is Business class, but can't explain why the itinerary says Coach. Can I trust them? I've forked over 125,000 miles for each ticket - I don't want to end up having my family fly Coach all that way...

Does anyone have a list of Air Tahiti fare codes?