May all of the information in AC 43-13-1B be used as approved data?

• A. Yes
• B. No, it is acceptable, but not necessarily approved data
• C. Only if the data is published in the Federal Register
• D. Only for certain aircraft types

Answer: (B)

AC 43-13-1B is a guidance document that lists acceptable methods, techniques, and practices for maintenance, repair, and alteration. It helps you determine safe ways to perform tasks when there isn’t a specific manufacturer procedure, but not every bit of information it contains is automatically FAA-approved data. For airworthiness sign‑offs, you must base actions on data that is FAA-approved for that aircraft and task (such as manufacturer data, ADs, STCs, or PMAs). So, information in AC 43-13-1B can be used as acceptable guidance, but it isn’t necessarily approved data in all cases.