Has anyone else noticed the 321s that AA was sending from CLT on Mondays during January and part of February? Normally, we get 319s, but for some reason, AA was sending scheduled 321s for the Monday rotation CLT-GSO-CLT. Any idea why that could be? just a scheduling issue where the 319s were busy on those dates and 321s free? or an experiment? I dont think they went out full although they weren't empty...it was nice to see them at GSO.