Title not stated in source
The change took effect on 31 October 1992.
- The record does not say how the former A, B, and C suffixes corresponded to the two resulting codes.
Source extraction notes
One source pattern split into a continuing restructured code and a newly created code.
Source documents (1)
Reviewed September 23, 2026 against references 1 and 2.
- Aircraft Communication and Navigation Systems and Communication and Navigation Systems
1. Internet Archive full-text OCR lines 590-625 (printed p. 1); adjudicated excerpt in audit · source dated January 1, 1994 · cited by the explanation
Printed page 1 (archive page 13) (opens in a new tab)2.Quoted official passage · 455X2A/B/C · docs/legacy-data/usaf-osr-lineage-audit.md:193; Internet Archive full-text OCR lines 590-625; adjudicated excerpt in audit · cited by the explanation
Printed page 1 (archive page 13) (opens in a new tab)3.Aircraft Communication and Navigation Systems and Communication and Navigation Systems · event transcription · docs/legacy-data/usaf-osr-lineage.jsonl:157; Internet Archive full-text OCR lines 590-625; adjudicated excerpt in audit
Printed page 1 (archive page 13) (opens in a new tab)