I'm booking a DONE4 with the AA desk. I wanted to use BA codeshare for a couple of flights on AA metal -- this would generate higher Avios for a BA exec card holder, and also help my wife to reach status (which requires paid BA tickets).
AA says this is not allowed and I must book using AA flight number for AA metal. Is that consistent with what others have found?
It's not a rule but AA prefers to book their own flight code. They capture more of the revenue that way.
The Avios earnt for BA and AA numbered flights are now almost the same. In D class, it's 250%, and the only difference is the minimum earnt on shorter flights (500 on AA, 1250 on BA). I can't imagine it's worth fighting over.
You only need 4 BA operated/marketed sectors (or IB operated) in the membership year.