N519AT was at Manchester, New Hampshire (MHT) yesterday. This 757 came in from Davis-Monthan AFB in CA and after three hours on the ground went down to Biloxi, Mississippi. Like the BUF example, this was a troop charter (returning ones, not deploying ones)
4000 series: scheduled
5000 series: charter
6000 series: were Ambassadair flights when we owned them...not too sure now...still might be
7000 series: non-revenue mx ferry or positioning
8000 series: military
35 years of American Trans Air/ATA Airlines, 1973-2008. A great little airline that will not be soon forgotten.