Low cost airline Norwegian Air Shuttle has quietly shuffled orders for six Boeing 787-9 Dreamliners to Chinese airplane leasing giant BOC Aviation. The transfer of the airplane order, worth $1.69 billion at list prices, became apparent after Boeing released its jet orders data for March. Boeing's data shows Norwegian had six fewer orders for the widebody jet in its backlog than previously reported, while Bank of China-owned BOC Aviation was identified as placing a new order for six Dreamliners. Norwegian…