Originally Posted by
imagineertobe
COS does not change these rules except on transcon flights.[/URL].
I suppose MX allows business class passengers to have lounge access. If so, AA members should still have lounge access by COS (even though not by status) on MX flights. In the worst case, a J passenger can remove the AA membership info, and have lounge access just like a normal J passenger without any FF programme affiliation.