The U.S. Air Force said the first delivery of KC-46 aerial refueling tankers from Boeing, which is scheduled for the second quarter of 2018, is more likely to occur late in the year. These potential delays will reportedly not result in additional program cost to the taxpayer. In the third quarter of 2017, the company took a 329 million dollar charge for its KC-46 aerial refueling tanker program in its quarterly results, which hurt profit.