Fire resistant repair patch and method

Abstract

A fire resistant patch for aircraft composite cargo bay liners. The patch includes a base member consisting of at least one inner sheet of woven fiberglass with outer layers of flame resistant plastic. A scrim consisting of a fiberglass lattice netting having a periphery larger than that of the base member includes a pressure sensitive adhesive on a bottom side thereof is also provided. A layer of resin containing a flame retardant additive is applied to the bottom side of the base member, and the base member is applied to the liner to cover the damaged area thereof. The resin layer is allowed to partially cure to retard movement of the base member. Strips of flame resistant tape may be affixed over the base member to hold it in place instead of the partial curing. The scrim is then placed over the base member and tape on the liner using the pressure sensitive adhesive. The scrim is placed such that the periphery thereof extends beyond the entire periphery of the base member. The peripheral area of the scrim extending beyond the base member is fixed to the liner using the adhesive on the scrim. The epoxy resin containing the flame resistant additive is then applied over the scrim, tape and base member. The resin coating is continuous and extends beyond the periphery of the scrim. Upon curing the resin provides structural strength and protects the base member from impinging flame.