first they have about 2 years to start timing out, plenty of time
second AAG dont care about stinking cost just pay
third most likely the 140's in the desert, if you like we can just ferry them right to you

lets not forget--From PDT's president:

"For those of you concerned with Dash 8 flying, rest assured that our turboprops aren’t going away any time soon. The Dash is an important part of the American Airlines’ route structure, and we expect to continue to fly both the -100s and -300s for the foreseeable future. Two of our Dash 8s have been painted in American Eagle livery; 23 more are scheduled to be painted over the next several months." good time to do the mod's.