Core Viewpoint - The AC332 helicopter has successfully completed its first-ever autorotation landing test in a high-altitude environment, marking a significant milestone for domestic dual-engine helicopters in China [2][6]. Group 1: Test Flight Preparation - The project team has meticulously prepared for the autorotation landing test, conducting thorough simulations and emergency response plans to ensure safety during the high-altitude test [3]. - The team has established clear responsibilities and protocols for each member involved in the test, emphasizing the importance of preparedness in mitigating risks [3]. Group 2: Phased Testing Approach - The testing process involved multiple phases, starting with the expansion of rotor speed parameters in a high-altitude environment, which helped build initial confidence in the helicopter's performance [4]. - Subsequent phases focused on identifying stable autorotation speeds and appropriate landing altitudes, leading to a more refined understanding of the helicopter's capabilities [4][5]. Group 3: Final Test Execution - On the day of the final test, all personnel were on high alert, with emergency teams ready to respond, ensuring that the helicopter was in optimal condition for the test [6]. - The helicopter successfully performed the autorotation landing after simulating an engine failure, demonstrating its reliability and the effectiveness of the project team's preparations [6]. Group 4: Future Implications - The successful completion of the autorotation landing test positions the AC332 as a leading product in the domestic civil helicopter market, with potential applications in emergency rescue and other critical operations [6].