This article begins with an overview of various types of damage. These include holes and punctures, delaminations, disbonds, core and resin damage, and water intrusion. The article describes various damage detection techniques, such as visual inspection, tap testing, and ultrasonic inspection, in field conditions. Designing for repair involves various considerations including structure types and repair types. The types of repairs together with other issues surrounding advanced composite repair technology are discussed. The article provides a discussion on the design considerations, instructions, and materials for repair. It describes various paint-removal methods for composites. The article concludes with a discussion on various curing equipment, namely, portable repair systems, vacuum bags, and ovens and autoclaves.