What with this? Some sort of training in a 727?
http://map3.flightaware.com/flight_track_map.rvt?ident=FDX9086;origin=KBFM;destination=KBFM;key=cfbcf35fb0c402213a7ac607a9551c2bc01426cd;height=350;width=400
It’s more likely that they use simulators for training and the flight you’re seeing is a maintenance/test flight.