Cathay Pacific Asia Miles - Can I upgrade a paid CX flight with AA miles?

As indicated in the subject, can I upgrade a paid coach class ticket on CX using my AA miles? I am looking into buying a coach ticket on CX from SFO-BKK-DEL and return. If it's possible to upgrade with AA miles, how many does it take? Also, are all coach CX fares upgradeable, or only certain fares? Are these upgrades done in advance or only on the day of departure?

Thanks for the help. (cross posted in AA forum)

You might want to check the fare basis. If it's a full-fare type, Y, Y2 or YX2, then it should be upgradable.

Not only the fare basis , but the booking class needs to be in Y.

Basically if AA can issue the ticket, then it's a full Y fare, and you need to get the upgrade certificate from AA first, then bring the certificate AND ticket to an AA counter where they will reissue the ticket for you.

CX does not do the upgrade for you. AA does.