It is important for the aircraft manufacturer to identify all the relevant stakeholders, in order to get their requirements towards the aircraft at the beginning of preliminary design phase. However, there hasn't been a specific and proper stakeholder-identification approach which is applicable in the aircraft project. In this paper, we propose an approach to identify the stakeholders for the aircraft manufacturer. Based on the investigation over the stakeholder concept and previous approaches to identifying stakeholders, we conclude a 'baseline stakeholder-extended stakeholder' approach to identify the stakeholders for the aircraft manufacturer. This brand-new approach is meaningful for the aircraft manufacturer to identify the relevant stakeholders in order to capture all their requirements on the developing aircraft.