Join Date: Oct 2001
Location: Falkirk, Scotland,VS Red, BA Gold, HH Diamond,UK Amex Plat
Programs: Master of the Privy Purse des Muccis
Posts: 19,251
Hi,
It will get the full tier points but only the 25% cabin bonus ( for AA business) compared to 50% cabin bonus for a BA flight number.
You should be able to use MMB.
I used MMB for BRU-LHR-LAX and BOS-LHR-BRU ( BA metal but AA flight nos)
Regards
TBS