Embraer KC-390 Embraer KC-390 PT-ZNF Embraer Brazilian Air Force. Two prototypes were planned by the program. The first prototype (PT-ZNF) rolled out from the Embraer subsidiary plant, Embraer Defense and Security, at Gavião Peixoto, São Paulo on 21 October 2014, and flew for the first time on 3 February 2015 Embraer KC-390 PT-ZNF Embraer Brazilian Air Force