G-IV maintenance flight to FL400?


#1

http://flightaware.com/live/flight/N397JJ/history/20060723/1828Z/KPNE/KPNE
Buddy of mine is a captain on this airplane. I have to ask him what this flight is all about, and the one prior to this one.
Seems like an awful lot of work for a mx flight (two actually)…all the way to FL400.