Appendix B to GM 21L.A.63 Classification of changes to a type certificate

• ED Decision 2023/013/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

Appendix B to GM 21L.A.63 Classification of changes to a type certificate ED Decision 2023/013/R The following tables provide examples of ‘substantial’ changes. The classification may change due to cumulative effects and/or combinations of individual changes. **A.1    Examples of ‘substantial’ changes for small aeroplanes (CS-23)** A.1.1  Table A-1 contains examples of changes that are ‘substantial’ for small aeroplanes (CS-23). Table A-1 — Examples of ‘substantial’ changes for small aeroplanes (CS-23) <table border="1" cellpadding="0" cellspacing="0" width="605"> <tr> <td valign="top" width="52"> <p>Example</p> </td> <td valign="top" width="261"> <p>Description of change</p> </td> <td valign="top" width="292"> <p>Notes</p> </td> </tr> <tr> <td valign="top" width="52"> <p>1.</p> </td> <td valign="top" width="261"> <p>Change to wing location (tandem, forward, canard, high/low).</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr> <td valign="top" width="52"> <p>2.</p> </td> <td valign="top" width="261"> <p>Fixed wing to tilt wing.</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr> <td valign="top" width="52"> <p>3.</p> </td> <td valign="top" width="261"> <p>A change to the number of engines.</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr> <td valign="top" width="52"> <p>4.</p> </td> <td valign="top" width="261"> <p>Replacement of piston or turboprop engines with turbojet or turbofan engines.</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr> <td valign="top" width="52"> <p>5.</p> </td> <td valign="top" width="261"> <p>Change to engine configuration (tractor/pusher).</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr> <td valign="top" width="52"> <p>6.</p> </td> <td valign="top" width="261"> <p>Change from an all-metal to all-composite aeroplane.</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> </table> **A.2    Examples of ‘substantial’ changes for rotorcraft (CS-27)** A.2.1  Table A-2 contains examples of changes that are ‘substantial’ for rotorcraft (CS-27). Table A-2 — Examples of ‘substantial’ changes for rotorcraft (CS-27) <table border="1" cellpadding="0" cellspacing="0" width="605"> <tr> <td valign="top" width="62"> <p>Example</p> </td> <td valign="top" width="251"> <p>Description of change</p> </td> <td valign="top" width="292"> <p>Notes</p> </td> </tr> <tr> <td valign="top" width="62"> <p>1.</p> </td> <td valign="top" width="251"> <p>Change to the number and/or configuration of rotors (e.g. main and tail rotor system to two main rotors).</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr> <td valign="top" width="62"> <p>2.</p> </td> <td valign="top" width="251"> <p>Change from an all-metal rotorcraft to all-composite rotorcraft.</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> </table> **A.3    Examples of ‘substantial’ changes for propellers (CS-P)** A.3.1  Table A-3 contains an example of a change that is ‘substantial’ for propellers (CS-P). Table A-3 — Example of a ‘substantial’ change for propellers (CS-P) <table border="1" cellpadding="0" cellspacing="0" width="605"> <tr> <td valign="top" width="62"> <p>Example</p> </td> <td valign="top" width="251"> <p>Description of change</p> </td> <td valign="top" width="292"> <p>Notes</p> </td> </tr> <tr> <td valign="top" width="62"> <p>1.</p> </td> <td valign="top" width="251"> <p>Change to the number of blades.</p> </td> <td valign="top" width="292"> <p>Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> </table> ##### Appendix B to GM 21L.A.63 Classification of changes to a type certificate *ED Decision 2023/013/R* The following tables provide examples of ‘substantial’ changes. The classification may change due to cumulative effects and/or combinations of individual changes. **A.1 Examples of ‘substantial’ changes for small aeroplanes (CS-23)** A.1.1 *Table A-1* contains examples of changes that are ‘substantial’ for small aeroplanes (CS-23). ***Table A-1 — Examples of ‘substantial’ changes for small aeroplanes (CS-23)*** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Example</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Description of change</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Notes</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 1.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Change to wing location (tandem, forward, canard, high/low).</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 2.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Fixed wing to tilt wing.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 3.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> A change to the number of engines.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 4.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Replacement of piston or turboprop engines with turbojet or turbofan engines.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 5.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Change to engine configuration (tractor/pusher).</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 6.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Change from an all-metal to all-composite aeroplane.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> </table> **A.2 Examples of ‘substantial’ changes for rotorcraft (CS-27)** A.2.1 Table A-2 contains examples of changes that are ‘substantial’ for rotorcraft (CS-27). ***Table A-2 — Examples of ‘substantial’ changes for rotorcraft (CS-27)*** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Example</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Description of change</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Notes</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 1.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Change to the number and/or configuration of rotors (e.g. main and tail rotor system to two main rotors).</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 2.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Change from an all-metal rotorcraft to all-composite rotorcraft.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> </table> **A.3 Examples of ‘substantial’ changes for propellers (CS-P)** A.3.1 Table A-3 contains an example of a change that is ‘substantial’ for propellers (CS-P). ***Table A-3 — Example of a ‘substantial’ change for propellers (CS-P)*** <table bgcolor="#d9d9d9" cellpadding="7" cellspacing="0"> <col/> <col/> <col/> <tr valign="top"> <td bgcolor="#808080"><p align="left"> <b>Example</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Description of change</b></p> </td> <td bgcolor="#808080"><p align="left"> <b>Notes</b></p> </td> </tr> <tr valign="top"> <td bgcolor="#d9d9d9"><p align="left"> 1.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Change to the number of blades.</p> </td> <td bgcolor="#d9d9d9"><p align="left"> Proposed change to the design is so extensive that a substantially complete investigation of compliance with the applicable type-certification basis is required.</p> </td> </tr> </table>