FAA AC 21.101-1 : 2016

Chapter 1 - Introduction
Chapter 2 - Overview of Sections 21.19 and 21.101
Chapter 3 - Process for Establishing the Certification
            Basis for Changed Products
Chapter 4 - Excepted Products under Section 21.101(c)
Chapter 5 - Other Considerations
Appendix A - Classification of Design Changes
Appendix B - Application Charts for Changed Product Rule
Appendix C - A Method to Determine the Changed and Affected Areas
Appendix D - Other Guidance for Affected Areas
Appendix E - Procedure for Evaluating Material Contribution to
             Safety or Impracticality of Applying Latest Requirements
             to a Changed Product
Appendix F - The Use of Service Experience in the Exception Process
Appendix G - Changed Product Rule Decision Record
Appendix H - Examples of Documenting the Proposed
             Certification Basis List
Appendix I - Related Documents
Appendix J - Definitions and Terminology

Gives guidance for establishing the certification basis for changed aeronautical products pursuant to Title 14 of the Code of Federal Regulations (14 CFR) 21.101, Designation of the applicable regulations.