I just discovered an equipment change for a flight that I've booked from ICN-NRT next May. At the time of booking, a few weeks ago, it was a 777, pmUA.

Now it has changed to a 737-800 with a seat map that is unlike any of the versions on either the United web site, or SeatGuru.

Thi aircraft has an F cabin showing 10 seats in total. The starbord side has 3 rows and the port side shows only two rows, with a second coat closet showing where the first row would normally be.

The overwing exit row also shows a two seat row, like on the 737-700.

Anyone know about this type of aircraft? Is it some rare Air Micronesia bird? I thought that the 737's were had been taken off flights to the big Asian cities like HKG or ICN.