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handle is hein.crs/govegjk0001 and id is 1 raw text is: Congressional                                                     ____
rResearch Service
Air Force Tanker Strategy Changes
Updated November 5, 2021
As discussed in the CRS report Air Force KC-46A Pegasus Tanker, the Air Force is in the process of
replacing its fleet of 396 KC-135 Stratotanker refueling aircraft, built in the 1950s and 60s, and 59 KC-10
Extenders, which entered service in 1981. Recent announcements indicate that the planned replacement
program is changing significantly from its original form, which Congress may consider in evaluating the
FY2022 defense budget requests.
The Air Force originally envisaged replacing the current tanker fleet in three stages.
 An initial acquisition of 179 new aircraft procured through the KC-X competition (won
by the Boeing KC-46A) would replace roughly one-third of the KC-135 fleet.
 A further 179 tankers were projected to be procured in a second solicitation called KC-Y;
initially projected as a new competition based on what aircraft were available at the time,
it was subsequently recast as a continuation of KC-46A procurement.
 A third program, KC-Z, was to be a replacement for the KC-10 fleet, a larger tanker than
the KC-46. Subsequently, the Air Force dropped plans for the KC-Z, envisioning it
instead as a third tranche of KC-46s.
However, it now appears that tanker procurement plans have changed in at least two ways.
One is that the KC-Y program is now to be a full and open competition rather than a follow-on KC-46
contract. The Air Force released a sources sought notice on June 16, 2021, seeking a commercial
derivative tanker aircraft. The requirement for commercial derivative, as opposed to new design, would
seem to limit the field to the KC-46 and the Airbus A330 Multi-Role Tanker Transport, a variant of which
is being marketed in the U.S. by Lockheed Martin as the LMXT. An earlier version of the A330 tanker
lost to Boeing after three rounds of a protracted and controversial KC-X competition.
The Air Force is referring to this prospective procurement as a Bridge Tanker, to fill in between the
current KC-X and future KC-Z; it is not clear how or whether that nomenclature distinguishes the
program from the already-scheduled KC-Y.
On December 12, 2019, the Air Force held an industry day, where interested vendors could offer briefings
on aerial refueling services and discuss requirements with military officials. A second industry day was
scheduled for a year later. An Air Force briefing about the program indicated a contract solicitation could
Congressional Research Service
https://crsreports.congress.gov
IN11537
CRS INSIGHT
Prepared for Members and
Committees of Congress

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