GM1 145.A.48(c) Performance of maintenance

• ED Decision 2022/011/R found in: Continuing Airworthiness (1321/2014) Part-M Part-145 Part-66 Part-147 Part-T Part-ML Part-CAMO Part-CAO (Jul 2024)

GM1 145.A.48(c) Performance of maintenance ED Decision 2022/011/R CRITICAL DESIGN CONFIGURATION CONTROL LIMITATIONS (CDCCL) The organisation should ensure that when performing maintenance the CDCCL are not compromised. The organisation should pay particular attention to possible adverse effects of any change to the wiring of the aircraft, even of a change not specifically associated with the fuel tank system. For example, it should be common practice to identify the segregation of fuel gauging system wiring as a CDCCL. The organisation can prevent adverse effects associated with changes to the wiring by standardising maintenance practices through training, and not through periodic inspections. Training should be provided to avoid indiscriminate routing and splicing of wires and to provide comprehensive knowledge of critical design features of fuel tank systems that would be controlled by a CDCCL. Guidance on the training of maintenance organisation personnel is provided in [Appendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3)](#_DxCrossRefBm1518545406)[\_DxCrossRefBm1518545406](#_DxCrossRefBm1518545406). ##### GM1 145.A.48(c) Performance of maintenance *ED Decision 2022/011/R* **CRITICAL DESIGN CONFIGURATION CONTROL LIMITATIONS (CDCCL)** The organisation should ensure that when performing maintenance the CDCCL are not compromised. The organisation should pay particular attention to possible adverse effects of any change to the wiring of the aircraft, even of a change not specifically associated with the fuel tank system. For example, it should be common practice to identify the segregation of fuel gauging system wiring as a CDCCL. The organisation can prevent adverse effects associated with changes to the wiring by standardising maintenance practices through training, and not through periodic inspections. Training should be provided to avoid indiscriminate routing and splicing of wires and to provide comprehensive knowledge of critical design features of fuel tank systems that would be controlled by a CDCCL. Guidance on the training of maintenance organisation personnel is provided in [Appendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3)](#_DxCrossRefBm1203440293)[\_DxCrossRefBm1203440293](#_DxCrossRefBm1203440293).