Copper grid repair technique for ligthning strike protection

摘要

A method for re-establishing the electrical continuity of an electrically conductive layer of a composite aircraft wing damaged by a lightning strike or other mechanical event is disclosed in which a copper patch (32) replaced the damaged section (50) of the electrically conductive layer contained. The repair is performed by first removing any surfacers (36), fasteners (12), and damaged electrically conductive layer (33) to expose a portion of the underlying composite skin (14). A copper patch having a copper foil section (52) coupled to an unsupported film adhesive (60) is then introduced onto an underlying composite skin opening contained within an undamaged section of a copper foil grid and covered with resin-impregnated fiberglass material (34). The film adhesive (60) and resin-impregnated fiberglass material (34) are then cured and fasteners (12) are then reinserted within the fiberglass material, copper patch (32) and underlying composite skin. The surface of the composite wing is then reprimed and repainted to complete the repair.