Hi,
I booked a OneWorld RTW ticket, with TAM being the issuing airline. After having started the trip I wanted to change the date of one flight, from Lima to Santiago, so no change in destinations. According to my understanding of the RTW rules this should be free of charge if the fare is the same, and not lead to having to pay a fee of USD 125. As per the rules such a fee only applies when changing "ticketed points", which I understand are the destinations booked (so flying from A to B, which were the same in my case).
However, TAM insisted that there is a penalty fee of USD 125 for changing the date of the flight (same flight from Lima to Santiago, same fare, just a different day). I gave in at some point, as I really needed to change the flight date. However, I would think that all Oneworld airlines have to follow the RTW rules (as stated here http://travelagent.oneworld.com/e-learning-lessons/newLesson/Downloads/files/oneworld_Explorer_rule_sheet.pdf) and cannot "interpret" the rules to their liking to make more money.
I just wanted to get this confirmed by some more knowledgable and RTW-experienced people in this forum before starting to fight with TAM to get my money back.
Thanks!