Visual Inspection: Discoloration & Corrosion
Visual Inspection Contents
Discoloration in glassivation outer layer is harmless and shall be acceptable, providing it is not obscuring any other damage.
There shall be no corrosion in metallization, or any other layers.
Metallization having any localized discoloration shall be closely examined and shall be rejected, unless it is demonstrated to be a harmless film, glassivation interface, or other non-obscuring effects.
Courtesy Rockwell Collins