The KAI KUH-1 Surion is a twin-engine, transport utility helicopter developed primarily by Korea Aerospace Industries (KAI), Agency for Defense Development (ADD) and Korea Aerospace Research Institute (KARI) jointly with Eurocopter. In 2006, the research and development phase of the Korea Helicopter Project - Korea Utility Helicopter (KHP-KUH), costing around 1.3 trillion won ($1.2 billion), was launched by the Agency for Defense Development. In 2012, full-scale production of the Surion commenced; KAI has been designated as the principal manufacturer of the type.