On Thursday, June 30, 2011, IFEZ, Incheon Metropolitan City, Incheon Metropolitan City Development Corporation, Korean Air, and Pratt & Whitney signed a project agreement to attract an aviation engine maintenance center in Yeongjong International City. The Yeongjong International City Aviation Engine Maintenance Center plans to invest 120 billion won in the total project cost to build the nation's largest aviation engine maintenance center on 67,535 square meters of land in the Unbuk-dong aviation industry cluster around Incheon International Airport by July 2014.