The abandoned or used aircrafts are dangerous when it comes to passenger or pilot's safety. Thus aircraft refurbishment is a key process involving the repair, cleaning, maintenance and renovation of the aircraft to bring it back to airworthy condition. Aircraft refurbishment is done at refurbishment yards or hangers. It includes weight balance, power plant operation, structural strength performance or other qualities affecting the airworthiness of the aircraft. The aircraft refurbishment includes various types of repairs namely aircraft structural repairs, system repairs, component repairs, engine repairs, avionics repairs and interior & exteriors refurbishments. Exterior refurbishment includes the repair and maintenance of exterior body, glasses etc. Interior refurbishment includes repair and refurbishment of windows, seats, tapestry, flooring and carpet, upholstery, cabinetry, air and sound proofing, color schemes etc. Aircraft structural refurbishment includes the overall repair and refurbishment of the structure of the aircraft from the exterior portion like the windows, body and fans. Aircraft system refurbishment includes the repair and maintenance of the computerized system and electronic circuitry of the aircraft. Component refurbishment states the repair of the components of the aircraft like electronic fittings, automated equipment and interior components while aircraft engine refurbishment includes the repair and maintenance of the aircraft engine and its parts to make it airworthy.