Air Force · AFSC history

421X2 Aircraft Hydraulic Repairman

In 1976, AFSC 421X2, Aircraft Hydraulic Repairman, became AFSC 423X4, Aircraft Pneudraulic Systems.

Codes named in this history

Codes without a directory match

  • 423X4 stated by the source. No directory or archive record matches.

Documented history

Aircraft Hydraulic Repairman

The record gives 1976 as the year of the change but does not specify a month or day.

Source documents (1)

Reviewed September 23, 2026 against reference 1.

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