Got it. Had to look up HUCA but will do! It's only 30 minute later - it was the aircraft change that I am bothered about.

We had some ticket credit to use before expiration so ticketed in First.

The email we received does not specify aircraft type for the change.

Just said:
We made these changes to your flight.■New depart time■New arrival time■New aircraft type■Seat change
But on aa.com says 757-Boeing 757 & has 4 rows of First.

I can't figure out specifically what type 757 we are rebooked on in terms of seats, IFE, etc. although seatguru says intl config.

Thanks.