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1 1 (November 20, 2020)

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              SConr essional
              Research Servik






Air Force Tanker Strategy Changes



November 20, 2020
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.
The Air Force view of KC-Z has been evolving for some time, and recent remarks by service leaders
indicated an interest in focusing that program less on the size of the tanker than other attributes such as
stealth, autonomy, and/or whether it should carry crew. However, it now appears that tanker procurement
plans have changed in at least two other ways.
One is that the KC-Y program is again to be a full and open competition rather than a follow-on KC-46
contract. As the Air Force seeks to acquire a nondevelopmental aircraft (i.e., one already available on the
market), this would seem to limit the field to the KC-46 and the Airbus A330 Multi-Role Tanker
Transport. 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. Funding for the bridge tanker may be in the FY2022 budget
submission scheduled to appear early in calendar 2021.



                                                                 Congressional Research Service
                                                                   https://crsreports.congress. gov
                                                                                       IN11537

CRS INS GHT
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