This unit of competency describes the skills and knowledge required to undertake scheduled and unscheduled aircraft maintenance work safely, under routine supervision, and in compliance with work health and safety (WHS) regulations. It requires the application of WHS practices relevant to aviation maintenance workplaces in order to ensure own safety and that of others in the workplace. Work may be performed individually or as part of a team.The unit applies to WHS practices in a range of workplaces, including flight lines, aprons, hangars, and workshops. Maintenance activities include scheduled and unscheduled maintenance on fixed or rotary wing aircraft and their components. The unit is used in workplaces that operate under the airworthiness regulatory systems of the Australian Defence Force (ADF) and the Civil Aviation Safety Authority (CASA).This unit forms part of the CASA requirement for maintenance certification licences under Civil Aviation Safety Regulation (CASR) Part 66. Where a CASA licensing outcome is sought, users must refer to the licensing provisions in the MEA Aeroskills Companion Volume Implementation Guide.