Editing Boeing E-3 Sentry (section)

==Variants==
[[File:Boeing E-3 Sentry LX-N 90454-3.JPG|thumb|NATO E-3s possess LX tail registration,<ref name=Wilson_p75/> as they are registered in Luxembourg. The chin bulge houses a suite of electronic warfare support measures.<ref name=Wilson_p75/>|alt=Four-engined jet aircraft in-flight with landing gear partially extended. A large disc-shaped radar perches on two convergent struts on the aft fuselage.]]

;EC-137D
:2 prototype AWACS aircraft with JT3D engines, 1 fitted with a Westinghouse Electric radar and 1 with a Hughes Aircraft Company radar. Both converted to E-3A standard with TF33 engines.
;E-3A
:Production aircraft with TF33 engines and AN/APY-1 radar, 24 built for USAF (later converted to E-3B standard), total of 34 ordered but the last 9 completed as E-3C.<ref name=Pithere3>Pither 1998, pp.&nbsp;40–42</ref> One additional aircraft retained by Boeing for testing,<ref name=Pithere3/> 18 built for NATO with TF33 engines and 5 for Saudi Arabia with CFM56 engines.<ref name=Pithere3/>
;KE-3A
:These are not AWACS aircraft but CFM56 powered tankers based on the E-3 design. 8 were sold to Saudi Arabia.<ref name=Pithere3/>
;RE-3A
:Three KE-3 airframes delivered as CFM56–powered strategic reconnaissance aircraft. Systems and external appearance are similar to the USAF’s [[RC-135V/W Rivet Joint]] platform. At least one of the RE-3As has received the extended "hog nose" as fitted to the RC-135.{{citation needed|date=November 2022}}
;E-3B
:USAF Block 30 modification. E-3As with improvements, 24 conversions.<ref name=Pithere3/>
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[[File:boeing.e3-d.sentry.takeoff.arp.jpg|thumb|A Sentry AEW1 of the RAF takes off]]-->
;E-3C
:USAF Block 35 modification. Production aircraft with AN/APY-2 radar, additional electronic consoles and system improvements, ten built.{{citation needed|date=October 2023}}
;JE-3C
:One E-3A aircraft used by Boeing for trials later redesignated E-3C.<ref name=Pithere3/>
;E-3D
:Production aircraft for the RAF to E-3C standard with CFM56 engines and British modifications designated ''Sentry AEW.1'', 7 built.<ref name=Pithere3/>  Modifications included the addition of a refueling probe next to the existing boom AAR recipticle, CFM-56 engines, wingtip ESM pods, an enhanced Maritime Surveillance Capability (MSC) offering Maritime Scan-Scan Processing (MSSP), JTIDS and Havequick 2 radios.{{citation needed|date=March 2023}}
;E-3F
:Production aircraft for the French Air and Space Force to E-3C standard with CFM56 engines and French modifications, 4 built.<ref name=Pithere3/>
;E-3G
:USAF Block 40/45 modification.<ref>{{Cite web |title=E-3 Airborne Warning and Control System (AWACS) Block 40/45 |url=https://www.dote.osd.mil/Portals/97/pub/reports/FY2016/af/2016e3awacs.pdf?ver=2019-08-22-105430-263 |access-date=9 August 2024 |website=[[Director, Operational Test and Evaluation]]}}</ref> Includes hardware and software upgrades to improve communications, computer processing power, threat tracking, and others, and automates some previously manual functions. Initial operating capability (IOC) declared in July 2014.<ref>[https://www.tinker.af.mil/News/story/id/123463680/ The wait is over…E-3 Block 40/45 deploys to combat theater]  – AF.mil, 18 November 2015</ref> It also removed the 1970 vintage mission computing.<ref>{{Cite web |title=E-3 Sentry (AWACS) |url=https://www.af.mil/About-Us/Fact-Sheets/Display/Article/104504/e-3-sentry-awacs/ |access-date=9 August 2024 |website=U.S. Air Force}}</ref> E-3G(II) Block 40/45 modification that included a glass cockpit modification that reduced the crew size by one, and added a new avionics suite.{{citation needed|date=October 2022}}