Integrated Avionics Manual Test Station and Component Specialty · Merged into 451X6, effective April 1, 1987
The source says 451X6 was created by combining these three explicitly listed predecessor AFSCs.
Sources
- F/FB-111 Avionics Test Station and Component Career Ladder AFSC 451X6 (Internet Archive full-text OCR lines 446-481; adjudicated excerpt in audit)