Annex 1 to Appendix 3 to AMC 20-20B Approval process for new repairs

• ED Decision 2021/007/R found in: AMC-20 Amdt 22 - Airworthiness of Products, Parts and Appliances (May 2021)
• ED Decision 2020/023/R found in: AMC-20 Amdt 21 - Airworthiness of Products, Parts and Appliances (Apr 2021)

Annex 1 to Appendix 3 to AMC 20-20B Approval process for new repairs ED Decision 2021/007/R The approval process for new repairs may use a three-stage approach, as now commonly used in the aviation industry. DT data includes inspection requirements, such as the inspection threshold, inspection method, and inspection repetitive interval, or may specify a time limit when a repair or modification needs to be replaced or modified. The required data may be submitted all at once, prior to the aircraft’ s return to service, or it may be submitted in stages. The following three-stage approval process is available, which involves incremental approval of engineering data to allow an aircraft to return to service before all the engineering data previously described is submitted. The three stages are described as follows: (a) The first stage is the approval of the static strength data and the schedule for submission of the DT data. This approval is required prior to returning an aircraft to service. (b) The second stage is approval of the DT data.Sufficient data to substantiate continued safe operation should be submitted no later than 12 months after the aircraft was returned to service, unless a temporary limitation was substantiated by sufficient fatigue and damage tolerance evaluation data and approved at the first stage of approval, in which case the second stageDT data should be approved before the temporary limit is reached. At the second stage, the DT data need only contain the threshold when inspections are required to begin as long as a process is in place to develop the required inspection method and repetitive intervals before the threshold is reached. In this case, the submission and approval of the remaining DT data may be deferred to the third stage.The approved threshold acts as a limitation on the repair data. (c) The third stage is approval of the inspection method and the repetitive intervals. This final element of the repair certification data in compliance with CS 25.571 should be submitted and approved prior to the inspection threshold being reached. The applicant should inform the operator if this process is being used, and of the expected timelines for the delivery of the data. To follow the three-stage process, the DAHs subject to Part 21 will need to establish procedures to be accepted by EASA under their design organisation approvals. [Amdt 20/2] [Amdt 20/20] [Amdt 20/22] Annex 1 to Appendix 3 to AMC 20-20 Approval process for new repairs ED Decision 2020/023/R The approval process for new repairs may use a three-stage approach, as now commonly used in the aviation industry. DT data includes inspection requirements, such as the inspection threshold, inspection method, and inspection repetitive interval, or may specify a time limit when a repair or modification needs to be replaced or modified. The required data may be submitted all at once, prior to the aircraft’ s return to service, or it may be submitted in stages. The following three-stage approval process is available, which involves incremental approval of engineering data to allow an aircraft to return to service before all the engineering data previously described is submitted. The three stages are described as follows: (a)       The first stage is the approval of the static strength data and the schedule for submission of the DT data. This approval is required prior to returning an aircraft to service. (b)       The second stage is approval of the DT data.Sufficient data to substantiate continued safe operation should be submitted no later than 12 months after the aircraft was returned to service, unless a temporary limitation was substantiated by sufficient fatigue and damage tolerance evaluation data and approved at the first stage of approval, in which case the second stageDT data should be approved before the temporary limit is reached. At the second stage, the DT data need only contain the threshold when inspections are required to begin as long as a process is in place to develop the required inspection method and repetitive intervals before the threshold is reached. In this case, the submission and approval of the remaining DT data may be deferred to the third stage.The approved threshold acts as a limitation on the repair data. (c)       The third stage is approval of the inspection method and the repetitive intervals. This final element of the repair certification data in compliance with CS 25.571 should be submitted and approved prior to the inspection threshold being reached. The applicant should inform the operator if this process is being used, and of the expected timelines for the delivery of the data. To follow the three-stage process, the DAHs subject to Part 21 will need to establish procedures to be accepted by EASA under their design organisation approvals. [Amdt 20/2] [Amdt 20/20] Annex 1 to Appendix 3 to AMC 20-20B Approval process for new repairs ED Decision 2021/007/R The approval process for new repairs may use a three-stage approach, as now commonly used in the aviation industry. DT data includes inspection requirements, such as the inspection threshold, inspection method, and inspection repetitive interval, or may specify a time limit when a repair or modification needs to be replaced or modified. The required data may be submitted all at once, prior to the aircraft’ s return to service, or it may be submitted in stages. The following three-stage approval process is available, which involves incremental approval of engineering data to allow an aircraft to return to service before all the engineering data previously described is submitted. The three stages are described as follows: (a)       The first stage is the approval of the static strength data and the schedule for submission of the DT data. This approval is required prior to returning an aircraft to service. (b)       The second stage is approval of the DT data.Sufficient data to substantiate continued safe operation should be submitted no later than 12 months after the aircraft was returned to service, unless a temporary limitation was substantiated by sufficient fatigue and damage tolerance evaluation data and approved at the first stage of approval, in which case the second stageDT data should be approved before the temporary limit is reached. At the second stage, the DT data need only contain the threshold when inspections are required to begin as long as a process is in place to develop the required inspection method and repetitive intervals before the threshold is reached. In this case, the submission and approval of the remaining DT data may be deferred to the third stage.The approved threshold acts as a limitation on the repair data. (c)       The third stage is approval of the inspection method and the repetitive intervals. This final element of the repair certification data in compliance with CS 25.571 should be submitted and approved prior to the inspection threshold being reached. The applicant should inform the operator if this process is being used, and of the expected timelines for the delivery of the data. To follow the three-stage process, the DAHs subject to Part 21 will need to establish procedures to be accepted by EASA under their design organisation approvals. [Amdt 20/2] [Amdt 20/20] [Amdt 20/22]