United converts 787-8 orders to 787-10

United Airlines has converted seven of its eight remaining B787-8 orders to the larger B787-10, while it prepares to take delivery of its first 787-9.According to a quarterly stock exchange filing, the Chicago-based airline will take the seven 787-10s from 2018 under the terms of a deal that was reached with Boeing in July. The 787-8s were scheduled for delivery during 2017 and 2018.United now has firm orders for one 787-8 that will be delivered later in 2014, 26 787-9s and 27 787-10s. The change will leave it with just 12 787-8s in its fleet after the final delivery.The airline