All the domestic 767's have ground-based Gogo installed. None of the international 767's (the 763ER's and 764's) have any form of Gogo installed yet to my knowledge (they will eventually get the satellite systems). N156DL is a 763ER and should not have the ground-based Gogo installed. Are you sure about your claim? If it were to have something installed, it would be the satellite system.