doubler 24 is used to transfer the load across the damaged area of arcuate flange 12 and to provide compressive load distribution at apertures 14 a thin sheet or thick film adhesive 28 may be positioned on top of the surface of arcuate flange 12 to act as an expansion joint between arcuate flange 12 and doubler 24 before adhesive 28 is positioned on arcuate flange 12 holes 30 may be cut from adhesive 28 to allow inserts 32 to be positioned within apertures 14 and overlap apertures 14 adhesive 28 may comprise any suitable material in some embodiments adhesive 28 may be a fluoroelastomer film that is stable in high temperature environments for example dupont 39 s viton u00ae fluoroelastomer available from eagle elastomer cuyahoga falls ohio in some embodiments it may be desirable to use a fluoroelastomer for adhesive 28 because of its rubbery and ductile properties which allow for thermal expansion differences when heated to high temperatures additionally fluoroelastomers may be employed for their fluid resistance which is necessary in extreme environments such as near hot aircraft engine oil doubler 24 may then be positioned over adhesive 28 and thereby become attached to arcuate flange 12 bridging the damaged area of arcuate flange 12 fig7 shows an exemplary non limiting method of installing doubler 24 to an arcuate flange 12 having one or more damaged apertures 14 a first the surface of arcuate flange 12 may be cleaned and the cracked material may be trimmed away if desired as represented by step 100 any adhesive in damaged aperture 14 a around bushing 16 may.