KC-46A is based on a commercial 767, the most fuel-efficient commercial airplane in its widebody class. With more than 1,000 built to date, the 767 is a proven commercial airliner, freighter and tanker already in service. The KC-46A Tanker is a widebody aircraft updated with the latest and most advanced technology and capable of meeting or exceeding the Air Force’s needs for transport of fuel, cargo, passengers and patients.