Corrosion Control · Converted to 427X1, effective 1977
The report identifies the governing career ladder as Corrosion Control; year precision preserved. A separate upcoming 427X1/427X5 merger was tentative and excluded. Verified source wording: “In 1977, the AFSC was changed from 531X4 to 427X1, with no change in responsibility.”
Sources
- Corrosion Control, AFSC 427X1 (Internet Archive full-text OCR around char offset 8,942; governing lineage context verified)