AMC3 21L.A.9(a) Instructions for continued airworthiness

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

AMC3 21L.A.9(a) Instructions for continued airworthiness ED Decision 2023/013/R DESIGN APPROVAL HOLDER (DAH) OR DECLARANT RESPONSIBILITY TO CHECK THE SUPPLIER DATA WHICH IS PART OF THE ICAs OR REFERENCED TOGETHER WITH THE ICAs The DAH or declarant may carry out a complete check of the supplier data, or may choose to rely, in whole or in part, on the supplier’s process for ensuring the accuracy and completeness of the data. In the latter case, the DAH or declarant will propose a means to validate the supplier’s process. Supplier data may also be issued by the supplier to the DAH or declarant under a contract or an arrangement, addressing the following: (a)     the accuracy and the adequacy of the technical documentation, which should be checked through a verification process (e.g. component workshop verification); (b)     evidence showing that workshop verification has been performed should be kept by the supplier and a clear statement should be given in the introduction to the supplier data as a confirmation that component verification is complete; (c)      evidence that the supplier has taken into account all justified feedback and changes to data requested by any person required to use the ICAs; typical examples would be the correction of reported errors, or mistakes. In addition, some validation activities may be decided by the DAH or declarant, depending on the articles and the capability level of the supplier. For articles subject to an ETSO authorisation, the validation of the supplier’s process for ensuring the accuracy and completeness of the data is not needed. This is also valid for other national TSO authorisations (e.g. FAA TSOs) accepted by EASA as stipulated in related bilateral agreements. ##### AMC3 21L.A.9(a) Instructions for continued airworthiness *ED Decision 2023/013/R* **DESIGN APPROVAL HOLDER (DAH) OR DECLARANT RESPONSIBILITY TO CHECK THE SUPPLIER DATA WHICH IS PART OF THE ICAs OR REFERENCED TOGETHER WITH THE ICAs** The DAH or declarant may carry out a complete check of the supplier data, or may choose to rely, in whole or in part, on the supplier’s process for ensuring the accuracy and completeness of the data. In the latter case, the DAH or declarant will propose a means to validate the supplier’s process. Supplier data may also be issued by the supplier to the DAH or declarant under a contract or an arrangement, addressing the following: (a) the accuracy and the adequacy of the technical documentation, which should be checked through a verification process (e.g. component workshop verification); (b) evidence showing that workshop verification has been performed should be kept by the supplier and a clear statement should be given in the introduction to the supplier data as a confirmation that component verification is complete; (c) evidence that the supplier has taken into account all justified feedback and changes to data requested by any person required to use the ICAs; typical examples would be the correction of reported errors, or mistakes. In addition, some validation activities may be decided by the DAH or declarant, depending on the articles and the capability level of the supplier. For articles subject to an ETSO authorisation, the validation of the supplier’s process for ensuring the accuracy and completeness of the data is not needed. This is also valid for other national TSO authorisations (e.g. FAA TSOs) accepted by EASA as stipulated in related bilateral agreements.