这一天还是来了！特朗普对C919飞机出手了，美国断供发动机等技术

Group 1 - The U.S. has requested to suspend technical support for China's C919 commercial aircraft, including engines and flight control systems, amid ongoing tensions over tariffs and trade issues [1] - The reliance on U.S. imports for critical components has been identified as a significant risk for the C919 project, prompting Chinese engineers to work on overcoming these technological challenges [2][8] - The C919 has faced difficulties in obtaining U.S. airworthiness certification, indicating potential challenges in the international market [3][5] Group 2 - The choice to rely heavily on foreign components for the C919 has proven to be a disadvantage, leading to increased costs and reduced efficiency [5][8] - There is a suggestion that the C919 should focus on the domestic market, where it can leverage its advantages against established competitors like Boeing and Airbus [6][10] - The successful testing of the CJ-1000A engine presents an opportunity for the C919 to shift towards using domestically produced engines, which could accelerate the localization of other components [8]