The Commercial Aircraft Corporation of China (COMAC) is actively transitioning its C919 supply chain toward domestic manufacturers. According to industry reports, the initiative has expanded beyond complex systems, such as engines, to include smaller, essential components like specialized sealants, paints, and fasteners.

This shift is part of a broader national strategy to insulate China’s aviation industry from potential supply chain disruptions and geopolitical pressures. By fostering a local ecosystem for aerospace manufacturing, Beijing aims to ensure the long-term viability of the C919 and future aircraft models. While the C919 currently relies on a mix of domestic and international technology, the push for 'indigenization' suggests a long-term goal of total supply chain autonomy. Industry observers note that while replacing high-tech systems remains a significant engineering challenge, the focus on basic materials indicates a systematic effort to build a self-reliant aerospace foundation from the ground up.