Boeing KC-46

KC-46 Pegasus
Boeing KC-46A prototype takes off from Paine Field on a test flight in July 2015.
Role	Air-to-air tanker, strategic airlift
Manufacturer	Boeing
First flight	25 September 2015
Introduction	2018 (planned)
Status	Under development
Primary user	United States Air Force
Produced	2013–present
Unit cost	US$147.4 million (ave. cost, FY16) US$241.1M (with R&D)
Developed from	Boeing KC-767

The Boeing KC-46 Pegasus is a military aerial refueling and strategic military transport aircraft developed by Boeing from its 767 jet airliner. In February 2011, the tanker was selected by the United States Air Force (USAF) as the winner in the KC-X tanker competition to replace older KC-135 Stratotankers. The first 18 combat-ready aircraft are scheduled to be delivered to the U.S. Air Force in early 2018 under the terms of the development contract.

The U.S. Air Force ran a procurement program to replace around 100 of its oldest KC-135E Stratotankers, and selected Boeing's KC-767. The Boeing tanker received the KC-767A designation from the United States Department of Defense in 2002 and appeared in the 2004 edition of DoD model designation report. The Air Force decided to lease 100 KC-767 tankers from Boeing.

Despite several nations leasing military aircraft, there was criticism. US Senator John McCain and others criticized the draft leasing agreement as being wasteful and problematic. In response to the protests, the Air Force struck a compromise in November 2003, whereby it would purchase 80 KC-767 aircraft and lease 20 more. In December 2003, the Pentagon announced the project was to be frozen when an investigation of allegations of corruption led to the jailing of one of its former procurement executives who applied to work for Boeing. The Air Force's KC-767A contract was officially canceled by the DoD in January 2006.

In 2006, the USAF released a request for proposal (RFP) for a new tanker program, KC-X, to be selected by 2007. Boeing had also announced it may enter an even higher capability tanker based on the Boeing 777, named the KC-777 Strategic Tanker. Airbus partnered with Northrop Grumman to offer the Airbus A330 MRTT, the tanker version of the A330, which was being marketed to the USAF under the company name, KC-30.