AC 43-13-1B is associated with which part of the CFR?

• A. 14 CFR Part 43
• B. 14 CFR Part 39
• C. 14 CFR Part 91
• D. 14 CFR Part 21

Answer: (A)

AC 43-13-1B provides acceptable methods, techniques, and practices for aircraft maintenance, repairs, and alterations. That guidance is tied directly to 14 CFR Part 43, which covers maintenance, preventive maintenance, rebuilding, and alterations of aircraft and related parts. Advisory Circulars like this one explain how to meet the requirements of the CFR part and are widely used as acceptable means of compliance in maintenance work.

The other CFR parts govern different areas: Part 39 deals with Airworthiness Directives, Part 91 covers general operating rules for aviation, and Part 21 concerns certification and airworthiness certification processes. They are not the sections that govern maintenance procedures and acceptable practices the AC addresses.