This case study analyzes the Murasaki Aircraft Corporation (MAC) project, focusing on lessons learned from the Airbus A380 and Boeing 787 Dreamliner projects. The report begins with an introduction to MAC, its stakeholders, and its goals of producing a lightweight aircraft through an international consortium. It then provides detailed overviews of the Airbus A380 and Boeing 787 Dreamliner projects, including major factors contributing to failures, such as incompetence, unrealistic expectations, communication conflicts, miscalculations, supply chain problems, outsourcing complexities, and high development costs. The consequences of these failures, including delays, cost overruns, and customer dissatisfaction, are examined. Key lessons learned are extracted from each case, emphasizing the importance of risk analysis, effective communication, realistic expectations, resource management, and thorough project reviews. The analysis concludes with recommendations for MAC, including the need for skilled project management, stakeholder engagement, employee training, and the use of agile methods to improve project outcomes.