Air Force · AFSC history

423X1 Aircraft Environmental Systems

In the 1989 Rivet Workforce restructuring, Aircraft Environmental Systems (AFSC 423X1) merged with AFSC 423X0. The three successor electrical and environmental career ladders were 452X5, 454X5, and 454X6.

Codes named in this history

Historical steps

The source names a code the branch later retired, or whose reviewed record is historical. Its story continues on that code's own page.

Other history records

These source identifiers have archive pages. Their availability does not establish current service use or retirement.

Documented history

Aircraft Environmental Systems

The merger is dated only to 1989; no month or day is given. January 1993 is the report's publication date, not the merger date.

  • The record does not explain how personnel were assigned among the three successor specialties.
Source extraction notes

Merged with 423X0 in the 1989 Rivet Workforce restructuring into the electrical and environmental ladders that were consolidated as 452X5 in April 1993, then converted to 2A6X6 on 31 October 1993. Confidence: high for lineage; year precision for the merger date.

Source documents (1)

Reviewed September 23, 2026 against references 1 and 2.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.