Originally Posted by
ISTFlyer
AA is much stricter these days about cross-benefitting.
It's still a YMMV situation but things might go or not go accordingly.
Yes. From AA
https://www.aa.com/i18n/aadvantage-p...conditions.jsp
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You cannot accrue partner airline miles with your partner frequent flyer number if you have already used your AAdvantageŽ number to obtain AAdvantageŽ program benefits such as First or Business Class upgrades, baggage fee waivers or complimentary access to Preferred/Main Cabin Extra seats. Additionally, you cannot redeem partner airline miles with your partner frequent flyer number and obtain AAdvantageŽ program benefits such as priority boarding and access to preferred seats.
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