Pope Francis to Fly AA charter WAS (AAFB)-JFK, JFK-PHL, PHL-FCO
http://www.cruxnow.com/church/2015/09/18/fun-facts-and-more-about-life-aboard-the-papal-plane/
Another interesting article. I think the only correction to make is the FAA call signal was officially changed to Shepherd One as indicated.
AA has a planning team working on this for quite some time so everything from the meal service to hosting the reporters (who pay the plane ticket price) has been carefully considered. I know someone is waiting to ask the miles question for the paid tickets.
Rasheed