you've got to understand that UA is trying to eliminate all of its 3 person flight decks. The 727s are expencive as all hell to operate, and half of the time they are broken.
There are current;y 75 in the fleet. Over the next three years they will be phased out. 25 will be leaving next year. They will be gone with in a matter of months, then the next year 25 will go, and so on.
I can tell you that most flight attendants hate those planes. There is only one galley cart on board. It is stocked with beverages. When they have to do meal service, they whole thing is done on foot. Yes you guessed it...the three f/a's in coach have to serve over 100 people running back and fourth from the galley.
Operations will be much simpler when the 727s are gone. Currently there is no replacement for the 75 planes. Who knows what UA will do?