American Airlines is awaiting the benefits of NextGen after investing around $400 million to retrofit its fleet, said Brian Will, an American Airlines captain. The carrier installed GPS on Boeing aircraft and equipped its MD-80s with displays for terminal area navigation. However, the FAA dropped the mandate that required the upgrades after the retrofits had been performed. "After we put that program in place, unfortunately, the [FAA's] intent to do that went away. It just disappeared," said Will.