Metals Processing · Converted to 427X4, effective April 1, 1977
Second directional code change in the source-stated career-ladder sequence; obvious OCR '19771' normalized to 1977. Verified source wording: “Originally established as AFS 532X0 in 1951, the Metals Processing career ladder AFSC was changed to 531X1 in 1975, and received the current designation of 427X4 in April 1977.”
Sources
- Metals Processing Career Ladder, AFSC 427X4. (Internet Archive full-text OCR around char offset 7,310; governing lineage context verified)