The 323rd was reactivated as the 323d Flying Training Wing (323 FTW), an Air Training Command (ATC) undergraduate navigator training (UNT) wing at Mather AFB, California on 1 April 1973, replacing the 3535th Navigator Training Wing which had existed at Mather since 1946.
As the sole navigator training wing for the entire Air Force, the 323 FTW also conducted advanced training for newly-winged navigators slated for subsequent as navigator-bombardiers and electronic warfare officers in B-52, FB-111, B-1, EF-111 and RC-135 aircraft as well as weapon systems officers in F-4 Wild Weasel variants.
The following operational squadrons were redesignated as a flying training squadrons as result of the 323rd's reactivation: 449th Flying Training Squadron (449 FTS), 450th Flying Training Squadron (450 FTS), 451st Flying Training Squadron (451 FTS), 452d Flying Training Squadron (452 FTS) and the 432nd Flying Training Squadron (432d FTS).

The 323 FTW also operated Mather AFB as the "host" wing for the installation while the Strategic Air Command's 320th Bombardment Wing (320 BMW) and the Air Force Reserve's SAC-gained 940th Air Refueling Group (940 ARG), later 940th Air Refueling Wing (940 ARW), were "tenant" wings.
 The 323 FTW also had responsibility for publishing Navigator magazine, a USAF-wide professional publication.
 The 323 FTW also conducted operational test and evaluation of the T-43A aircraft from 1 August 1973 – 31 October 1973 and began conversion from the T-29 to the T-43 shortly afterwards.
As the only USAF flight training school teaching air navigation, the wing served not only the active duty USAF, but also the Air National Guard, the Air Force Reserve and friendly foreign nations.

With the decommissioning of the U.S. Navy's Training Squadron TWENTY-NINE (VT-29) at NAS Corpus Christi, TX in 1975, the 323 FTW also began training U.S. Navy student Naval Flight Officers destined for land-based naval aircraft, NATO/Allied student naval flight officers under U.S. Navy responsibility also destined for land-based maritime aircraft, and U.S. Coast Guard enlisted navigators for that service's HC-130 aircraft starting in July 1976.
Instructor Naval Flight Officers, mostly from the Navy's P-3 community, were administratively assigned to Naval Air Training Unit Mather (NAVAIRTU Mather) and embedded in the 323 FTW, teaching USAF, USN and NATO/Allied students.

Support of the Marine Aerial Navigation School (MANS) for U.S. Marine Corps enlisted KC-130 navigators also began in July 1976 when MANS moved from NAS Corpus Christi to Mather AFB.
However, MANS conducted its own navigation training independently.

In view of this influx of naval personnel, Naval Air Training Unit Mather (NAVAIRTU Mather) was established in 1976 under the Chief of Naval Air Training (CNATRA).
In order to place the Navy organization on par with the 323 FTW commander, a USN Captain or Captain-selectee naval flight officer who had already had been the commanding officer of an operational combat P-3 squadron was placed as the commanding officer of NAVAIRTU Mather, with administrative claimancy over all naval personnel (students, instructors and support staff) assigned to the 323 FTW.

The 323 FTW began training female USAF navigators in March 1977 and female USN naval flight officers in 1981.
Female USAF instructor navigators followed in the 1983–84 time frame.
In 1986, LT Kathryn P. Hire, USN a former navigator and aircraft mission commander in the RP-3D Orion oceanographic research aircraft, became the first female USN NFO Instructor in the 323 FTW.
Of note is that in 1993, then-LCDR Hire would become the first female assigned to the combat version of the P-3C Orion, and as a CDR and CAPT, would become a NASA mission specialist astronaut, flying the STS-90 mission in 1998 and the STS-130 mission in 2010.

On 15 December 1991, the 323d implemented the objective wing concept and the 449th, 450th, 451st, 452d and 432d FTSs were inactivated and the wing was reorganized to a single squadron of aircraft type.
All T-43As were assigned to the 445 FTS and T-37Bs to the
The 323rd was reactivated as the 323d Flying Training Wing (323 FTW), an Air Training Command (ATC) undergraduate navigator training (UNT) wing at Mather AFB, California on 1 April 1973, replacing the 3535th Navigator Training Wing which had existed at Mather since 1946. As the sole navigator training wing for the entire Air Force, the 323 FTW also conducted advanced training for newly-winged navigators slated for subsequent as navigator-bombardiers and electronic warfare officers in B-52, FB-111, B-1, EF-111 and RC-135 aircraft as well as weapon systems officers in F-4 Wild Weasel variants. The following operational squadrons were redesignated as a flying training squadrons as result of the 323rd's reactivation: 449th Flying Training Squadron (449 FTS), 450th Flying Training Squadron (450 FTS), 451st Flying Training Squadron (451 FTS), 452d Flying Training Squadron (452 FTS) and the 432nd Flying Training Squadron (432d FTS).
The 323 FTW also operated Mather AFB as the "host" wing for the installation while the Strategic Air Command's 320th Bombardment Wing (320 BMW) and the Air Force Reserve's SAC-gained 940th Air Refueling Group (940 ARG), later 940th Air Refueling Wing (940 ARW), were "tenant" wings.  The 323 FTW also had responsibility for publishing Navigator magazine, a USAF-wide professional publication.  The 323 FTW also conducted operational test and evaluation of the T-43A aircraft from 1 August 1973 – 31 October 1973 and began conversion from the T-29 to the T-43 shortly afterwards. As the only USAF flight training school teaching air navigation, the wing served not only the active duty USAF, but also the Air National Guard, the Air Force Reserve and friendly foreign nations.
With the decommissioning of the U.S. Navy's Training Squadron TWENTY-NINE (VT-29) at NAS Corpus Christi, TX in 1975, the 323 FTW also began training U.S. Navy student Naval Flight Officers destined for land-based naval aircraft, NATO/Allied student naval flight officers under U.S. Navy responsibility also destined for land-based maritime aircraft, and U.S. Coast Guard enlisted navigators for that service's HC-130 aircraft starting in July 1976. Instructor Naval Flight Officers, mostly from the Navy's P-3 community, were administratively assigned to Naval Air Training Unit Mather (NAVAIRTU Mather) and embedded in the 323 FTW, teaching USAF, USN and NATO/Allied students.
Support of the Marine Aerial Navigation School (MANS) for U.S. Marine Corps enlisted KC-130 navigators also began in July 1976 when MANS moved from NAS Corpus Christi to Mather AFB. However, MANS conducted its own navigation training independently.
In view of this influx of naval personnel, Naval Air Training Unit Mather (NAVAIRTU Mather) was established in 1976 under the Chief of Naval Air Training (CNATRA). In order to place the Navy organization on par with the 323 FTW commander, a USN Captain or Captain-selectee naval flight officer who had already had been the commanding officer of an operational combat P-3 squadron was placed as the commanding officer of NAVAIRTU Mather, with administrative claimancy over all naval personnel (students, instructors and support staff) assigned to the 323 FTW.
The 323 FTW began training female USAF navigators in March 1977 and female USN naval flight officers in 1981. Female USAF instructor navigators followed in the 1983–84 time frame. In 1986, LT Kathryn P. Hire, USN a former navigator and aircraft mission commander in the RP-3D Orion oceanographic research aircraft, became the first female USN NFO Instructor in the 323 FTW. Of note is that in 1993, then-LCDR Hire would become the first female assigned to the combat version of the P-3C Orion, and as a CDR and CAPT, would become a NASA mission specialist astronaut, flying the STS-90 mission in 1998 and the STS-130 mission in 2010.
On 15 December 1991, the 323d implemented the objective wing concept and the 449th, 450th, 451st, 452d and 432d FTSs were inactivated and the wing was reorganized to a single squadron of aircraft type. All T-43As were assigned to the 445 FTS and T-37Bs to the 
323d Air Expeditionary Wing