Group 1 - The U.S. government has lifted the ban on the sale of jet engine parts and technology to Chinese buyers, which is expected to boost China's domestic aircraft production and expand its international market presence [1] - The agreement allows COMAC to import parts from a joint venture invested by General Electric, specifically for the C919 and C909 aircraft, facilitating the fulfillment of hundreds of narrow-body C919 orders [1] - The recovery of engine supply is crucial for COMAC, as the C919 and C909 rely heavily on General Electric's engines [1] Group 2 - Despite the dependency on U.S. companies, General Electric also relies on the Chinese market, with 28% of its aviation business revenue coming from China [2] - General Electric has placed an order for 20 C919 aircraft, indicating its investment in the Chinese aviation market [2] - China is pursuing the long-term strategic goal of developing its own backup engine, the CJ-1000, which is not directly influenced by changes in U.S. trade policy [2] - The first C919 aircraft entered commercial operation in 2023, and COMAC is seeking certification from the European Union Aviation Safety Agency, which would enhance global recognition of the C919 [2]

来源：环球时报 【环球时报综合报道】配备国产航空电子设备、供电系统和空调系统的俄罗斯"MC-21"中程客机试验样 机日前完成首次飞行。飞行持续1小时15分钟，标志着工厂调整试验的开始。4月29日，这架样机从"雅 科夫列夫"公司（隶属俄罗斯国家技术集团旗下联合航空制造公司）伊尔库茨克飞机制造厂机场起飞。 飞行过程中，样机达到580公里/时的速度，爬升至3000米高度。试飞员古西科夫（Aleksandr Guskov）、俄罗斯英雄塔斯卡耶夫（Roman Taskaev）和试飞主管工程师波波夫（Aleksandr Popov）及 索洛维约夫（Aleksandr Solovev）组成的机组圆满完成飞行任务。包括俄全新国产系统在内的所有飞机 系统运行正常，未出现任何问题。 配备国产航空电子设备、供电系统和空调系统的俄罗斯"MC-21"中程客机试验样机在伊尔库茨克完成首 次飞行。 研发进入良好开端 卢卡舍维奇接受《俄罗斯报》采访时说，认证测试计划通常包括数十次甚至数百次飞行，涵盖不同飞行 模式、气候区和天气条件。他说："第十次飞行就像一岁孩童开始学走路的第三天。这都是很正常的过 程。飞机还需在高海拔、沙漠和海洋条件下测试 ...