Appendix 1 to ETSO-C214 A1 - 'Open' class IMA equipment

• ED Decision 2020/011/R found in: CS-ETSO Amdt 17 - European Technical Standard Orders (Oct 2026)

###### Appendix 1 to ETSO-C214 A1 – ‘Open’ class IMA equipment *ED Decision 2020/011/R* This Appendix is applicable to ‘open’ class IMA equipment. **1 IMA resources of ‘open’ class equipment** When the C214-ETSO article is of the ‘open’ class, the F-ETSO applicant needs to properly characterise and document the resulting platform resources and partitioning features for the next user. Three main cases of ‘open’ equipment are distinguished in order to adapt the requirements to the development specificities of the F-ETSO article as follows: (a) When the applicant uses only one [ETSO-C153a](#_DxCrossRefBm920220674) platform and does not augment its resources, as illustrated below: **Shared resources of the F-ETSO equipment**  Note: ETSO-\*C153\* is intended to identify any existing amendment of this ETSO including its first release as ETSO-2C153 …then the applicant shall describe the use of the original ETSO-C153a platform with regard to the [ETSO-C153a Appendix 3](#_DxCrossRefBm920220885) data (such as the user guide) and describe the remaining resources with respect to that Appendix 3 data so that it is clear which shared resources remain available for future incremental development by an independent user or aircraft manufacturer. In particular, the resources that are used and allocated shall be described and quantified. (b) When the F-ETSO equipment integrates multiple ETSO-C153a‑authorised resources without augmenting the IMA sharing capability, as illustrated below: **Shared resources of the F-ETSO equipment**  …the F-ETSO applicant shall characterise the resulting platform using the individual characterisation of the ETSO-C153a platform and document the resulting [ETSO-C214](#_DxCrossRefBm920220673) ‘open’ platform in compliance with ETSO-C153a Appendix 3. (c) When the F-ETSO equipment augments the IMA sharing resources with additional development (hardware and/or software), as illustrated below: **Shared resources of the integrated F-ETSO equipment**  …the F-ETSO equipment development shall comply with [ETSO-C153a Appendix 2](#_DxCrossRefBm920220886) and the related classes and document the augmented ‘open’ platform C214 in compliance with ETSO-C153a Appendix 3. The applicant can use the ETSO-C153a Appendix 3 data of the ETSO-C153a platform/modules that are used and augment or amend them to elaborate the ETSO-C214 ‘open’ platform user data, in compliance with ETSO-C153a Appendix 3. Within the characterisation effort of resources, the applicant should in particular document the instructions for configuration of the ETSO-C214 article so that the next user can ensure the integrity and continuity of the system configuration, and ensure that the resource allocation, partitioning, and health monitoring would not be impaired when integrating the ETSOA article. **2 Continuous health monitoring capability** As a user of an ETSO-C153a platform/modules, the F-ETSO applicant should pay particular attention to ensuring that there is a continuous health monitoring capability. Health monitoring features provided in an ‘open’ class platform shall be continuously maintained and characterised throughout the integration process, and the health monitoring capability shall be made available for any potential further incremental development. [Amdt ETSO/14] [Amdt ETSO/16]