Originally Posted by
goirulz
I was wondering whether the trans-pacific legs could count towards my challenge even though I booked them under CX codes and not their AA codeshares?
Have a look at the
Challenge page on the FlyerGuide wiki--it's long, but you'll want to know all of the information in there before starting. Short answer: you must book an AA flight number for the EQPs you earn to count toward a challenge.