[20190314]IN11072_波音737 MAX坠毁动摇国际航空安全信心.pdf

CRS INSIGHT Prepared for Members and Committees of Congress INSIGHTINSIGHTi i Boeing 737 MAX Crashes Shake Confidence in International Air Safety Bart Elias Specialist in Aviation Policy March 14, 2019 Recent foreign air disasters involving Boeing 737 Max airplanes have raised international concern about the safety of that aircraft and passenger airline safety in general. On October 29, 2018, Lion Air flight 610 crashed shortly after departure from Jakarta, Indonesia, killing all 189 on board. While the investigation of the crash is still ongoing, it has been disclosed that pilots flying the same aircraft the previous day experienced some sort of navigation system failure and that maintenance records revealed ongoing problems with the aircrafts airspeed and angle-of-attack (AOA) sensors that monitor relative aircraft pitch. Aviation experts expressed concerns that faulty indications from these sensors could cause the aircrafts flight automation to command a pitch-down response. The investigation also revealed that aircraft documentation and pilot training may not have fully explained how the automation would respond under these circumstances. On March 10, 2019, Ethiopian Airlines f