The production aircraft are built at Piedmont Triad International Airport. Construction of the factory began in 2007 and was completed in late 2011.[32][33] In early 2015, there were 12 aircraft in final assembly and five more in earlier stages of production.[3] Twenty aircraft were in production by May 2015. Honda estimated it would produce 40 aircraft in the first full year and up to 60 each year after that.[4] The engine factory achieved certification in March 2015.[26][34]