SIA Engineering Co Ltd and its subsidiaries maintain, repair, and overhaul aircraft for many airlines. The company is organized into two segments: airframe/line maintenance and engine/component. The airframe and line maintenance segment provides airframe maintenance, line maintenance, and inventory technical management. These services include scheduled routine maintenance and overhaul, specialised and non-routine maintenance, modification and refurbishment programmes. Line maintenance provides aircraft certification and technical ground handling services such as pushback and towing, and the provision of aircraft ground support equipment and rectification work. The engine and component segment provides component overhaul and engine repair and overhaul services.