波音787空难真相，最近还是少坐为妙

Core Viewpoint - The analysis of the Indian Airlines Flight 171 incident indicates that the aircraft's takeoff appeared normal initially, but subsequent failures in the landing gear retraction and potential loss of hydraulic, electrical, or engine power led to the crash [1][3][32]. Group 1: Takeoff Analysis - The takeoff process from Ahmedabad Airport was closely scrutinized, with experts noting no signs of engine thrust issues during the initial phase [3]. - Flight data showed that the aircraft used a normal runway length and took off from a consistent position compared to previous flights [4][6]. - Monitoring data indicated that the aircraft was on the runway for a typical duration before takeoff, with no records of abnormalities [8]. Group 2: Wing Components and Gear Retraction - There were questions regarding the deployment of the flaps and slats, which are crucial for lift during takeoff, but evidence suggests they were likely deployed [14][20]. - Video analysis revealed that the landing gear did not retract properly after takeoff, indicating a possible malfunction in the retraction system [24][28]. - Experts noted that while the aircraft can fly with the landing gear down, it is standard procedure to retract it to reduce drag [25]. Group 3: Emergency Systems and Power Loss - The aircraft likely activated its emergency power system, known as the ram air turbine, after experiencing a loss of electrical or hydraulic power [33][34]. - Audio analysis indicated that sounds consistent with the activation of the emergency generator were present during the incident [35][38]. Group 4: Flight Path and Engine Performance - Notably, the aircraft did not exhibit any significant deviation from its flight path prior to the crash, suggesting a symmetrical loss of power rather than a failure of a single engine [39][42]. - Experts highlighted that simultaneous engine failure is rare and could be attributed to fuel contamination or incorrect flight parameters entered before takeoff [43].