Nhờ Airsearails mới được biết thêm chuyện lạ. Té ra là "In an unusual joint venture, Air Viet Nam was joined by Continental Air Services, Inc in the mid-1960s. Under this agrement, CASI would share passengers and cargo routes with Air Viet Nam on certain domestic and international routes. In addition, CASI and Air Viet Nam would share hangars and flight lines. CASI also picked up a portion of aircraft maintenance. Heavy engine overhaul was done in Hong Kong by China Airlines, and some in the Republic of China, by Air Asia (a subsidiary of Air America). CASI paid a portion of its revenues to Air Viet Nam for routes and privileges. Many CASI aircraft operating from Saigon carried the dragon-flag roundel of Air Viet Nam.".