AirTran Airways, a subsidiary of AirTran Holdings, Inc., (NYSE: AAI), yesterday began a planned upgrade of its internal reservations and airport check-in systems which will bring long term benefits to our customers. It required a preplanned shutdown of the system from 10 pm Monday, June 19, 2006, through 4:30 am this morning. The airline began experiencing passenger check-in problems early this morning that caused rollover delays into the early afternoon. This has resulted in long lines at a number of airports, primarily Hartsfield-Jackson Atlanta International Airport.