AppendixAppendix
Appendix B to GM 21.A.101Application charts for changed product rule
Table A-16. Application Chart for 21.A.101(a) and (b) and 21.A.19
| Substantial (21.A.19) | Significant (21.A.101(a) and (b)) | Not Significant (21.A.101)(b)(1)) | ||||
|---|---|---|---|---|---|---|
| Substantially changed product Compliance with all latest CSs required for product certification. Previously approved type design and compliance data may be allowed if valid for the changed product. | Affected area (Changed and/or affected areas) New demonstration of compliance is required Previously approved type design and compliance data may be allowed if valid for the changed product. | Unaffected area No new demonstration of compliance is required. Unaffected area continues to comply with the existing certification basis. | Affected area (Changed and/or affected areas) New demonstration of compliance is required. The applicant may propose a certification basis using an earlier amendment but not earlier than in the existing TC basis. Previously approved type design and compliance data may be allowed if valid for the changed product. | Unaffected area No new demonstration of compliance is required. Unaffected area continues to comply with the existing certification basis. | ||
| Compliance with the latest amendment materially contributes to safety | No material contribution to safety | |||||
| Practical — | Impractical The applicant may propose a certification basis using earlier CS(s), but not earlier than the existing TC basis. | The applicant may propose a certification basis using earlier CS(s), but not earlier than the existing TC basis. | ||||
| Certification Basis Proposed by the Applicant | ||||||
| New certification basis using latest CSs. | CSs at earlier amendments with supporting rationale. | Existing certification basis. | Existing certification basis including ‘elects to comply’. | Existing certification basis. | ||
| EASA Resultant Type-Certification Basis | ||||||
| New certification basis using the latest CSs, and special conditions if required. | New certification basis using the CSs at earlier approved amendments, and special conditions if required. | Existing certification basis. | Existing certification basis (if adequate); if not, first appropriate later amendment(s) and/or special conditions including ‘elects to comply’. | Existing certification basis. | ||
Table A-17. Application Chart for 21.A.101(c) Excepted Products
| Affected area (Changed areas and/or unchanged but affected) New demonstration of compliance is required. Previously approved type design and compliance data may be allowed if valid for the changed product. | Unaffected area No new demonstration of compliance is required. Unaffected area continues to be compliant with the existing TC basis. | |||
|---|---|---|---|---|
| Type-Certification Basis Proposed by the Applicant | ||||
| The existing TC basis, including ‘elects to comply’. | The existing TC basis. | |||
| Found by EASA to be ‘significant in an area’. | Not ‘significant in an area’. | |||
| Compliance with a later amendment materially contributes to safety. | No material contribution to safety. | |||
| Practical | Impractical | |||
| EASA Resultant Type-Certification Basis | ||||
| The latest amendment designated by EASA including special conditions and including ‘elects to comply’. | The existing TC basis. If inadequate, the first appropriate later amendment. If not appropriate, add special conditions, including ‘elects to comply’. | The existing TC basis. | ||
APPENDIX · Appendix B to GM 21.A.101 — Regulation (EU) No 748/2012 · ED Decision 2017/024/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025