Originally Posted by
rmadisonwi
Long and short of it: UA doesn't actually assign a specific narrowbody fleet type until a month or two before departure, so they put "dummy" seat maps that allow for equipment to be flexible, down to the A319 (which only has 8 F seats) without resulting in an oversell situation in F if they sell out too many F seats in advance of settling on the equipment for the trip.
The seat map (and the actual type flying the flight) will probably change one or more times before the actual flight.
that would just make too much sense
and it is not what is going on because I am still seeing F12 for A320s! It just the 738/739 fleet that they now decided to limit to 8. Nobody knows what super idiot/genius decided this was a good idea .... like months out ... only offering full fare on most flights is a great way to make premium pax book another carrier.