Marsh & McLennan Companies Inc. $(MMC)$, through its subsidiary Oliver Wyman, has released a joint study with the International Air Transport Association (IATA) analyzing ongoing supply chain challenges in the aerospace industry. The report, titled "Reviving the Commercial Aircraft Supply Chain," highlights that supply chain disruptions could cost airlines over $11 billion in 2025. Key contributing factors include geopolitical instability, raw material shortages, and tight labor markets. The study recommends actions such as increasing transparency across supplier levels, adopting aftermarket best practices, leveraging predictive maintenance and shared data platforms, and expanding repair and parts capacity. The report calls for greater industry collaboration to address these challenges and improve overall supply chain resilience.