Originally Posted by
happyintheair
Hi. Thanks for confirming the AA bit of the 'bug' - but the BA site wouldn't let me check in to the BA flight at all.
IME with a flight on BA metal but a ticket with a partner airline codeshare flight number then I see 2 PNRs in MMB. One is the BA PNR and the other is the partner airline PNR. I can OLCI for the flight on BA metal using the BA PNR.
However, I have only done this on flights with MA flight numbers, not AA, so YMMV.