Embraer Flies First U.S Assembled Legacy 500 Another milestone was met for Embraer recently when the company flew the first United States assembled Legacy 500 midsize executive jet. The aircraft was put together at Embraer's Melbourne plant in Florida. The achievement comes just eight months after the company assembled the first Legacy 450 at the same Melbourne facility. The Melbourne, Florida Embraer plant has expanded its production capabilities to building the airframer's midsize line jets -the Legacy 450 and 500-. The entry-level Phenom 100 and 300 aircraft are also manufactured at this facility.