**Description:** Lays out and locates structural components or assemblies in making production assemblies as specified by design changes, working from blueprints or other authorized documents. Performs difficult structural pick-up and/or rework such as removing, replacing or realigning ribs, bulkheads, stringers, or fittings in completed skinned assemblies, or where a considerable portion of the operation consists of reforming, recontouring or refitting to provide an acceptable assembly. Works structural changes which materially alter previous assembly references and practice. Performs trimming, reforming and altering parts and structures as required. Fabricates detail parts such as shims, splices, gussets, angles, brackets, doublers, stiffeners and patches. Performs portable milling operations on wing and center section attaching joints. Must be able to layout and secure coordination of assemblies working to station, water, center, butt, and chord lines shown on engineering documents....