A2 Approval need for Appendix D Cle

A2 Approval need for Appendix D Cleaning: Suppliers are required to have approval to Type I or Type II Aluminum in order to perform the cleaning process in Appendix D.A3 Approval needed for Appendix E Cleaning: Suppliers are required to have an explicit approval for Appendix E in order to perform the cleaning process in Appendix E.A4 Cleaning of Cast Aluminum per Appendix D: Cleaning of “high-silicon” containing cast aluminum with acids often will cause significant darkening of the grain boundaries. The resulting surface will not have a uniform luster as seen with forged aluminum materials. The specification recommends that design engineers evaluate the specific cast aluminum alloy for appropriate cosmetic appearance – in cleaned surface state – prior to specifying the alloy for components. A5 Cleaning of GFPPS Composite Materials per Appendix E: This process is unique in that the etching step has a defined end point: complete removal of glass fibers without significant formation of surface pits. A Process Qualification Plan (PQP) per Applied Materials QMS document is recommended for each component that requires cleaning per Appendix E.