Visual investigation: in our investigation we could find the described damages on the surface, the surface is scratched and therefore the black coating is partly damaged, too.The coating cannot flake of, the only way to damage the coating is by damaging the carrier material.Furthermore we found signs of friction on the sliding surface.Batch history review: due to the fact that no lot number was provided, a review of the device history records for the complained device is not possible.Conclusion and measures / preventive measures: on the basis of the current information and the investigation results, a clear conclusion can not be drawn.There is no indication for a material defect, manufacturing failure or design error.Based on the investigations and results of the 8d report a capa is not necessary.
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