Status-less peasant here (working on it though!). I'm shortly going to be flying LHR-MIA Business on AA, a couple of days later MIA-LAX First on an AA B777, then the next day LAX-HKG Business on AA codeshare but CX operated.

The transcon rules seem a bit confusing to a simple soul like me but would I be right in deducing that lounge access will not be available to me for the MIA-LAX leg and that the two oceanic sectors being on AA will not change that?

Thanks.