Initial airworthiness determines whether an aircraft or new part is fit for entry into use. However, for an aircraft to provide continued, safe, effective operation continued airworthiness is key. The way in which a part or aircraft deemed airworthy initially maintains its airworthiness is by regular inspection, maintenance, replacement when required, and a periodic overview of all standards. This final chapter describes how initial airworthiness facilitates continued airworthiness and the general methods and procedures used to ensure that once an aircraft or part enters service as an airworthy component, it is maintained in an airworthy condition.