[ti:Ask a Teacher: Are You Laughing or Smiling?] [00:00.00]如果您也喜欢 恒星英语学习网 www.hxen.com 请与您的朋友分享... [00:00.01]The pilots of Ethiopian Airlines Flight 302 [00:04.73]followed all of Boeing's recommended steps [00:08.19]when their plane began to nose dive shortly after takeoff. [00:12.84]But they still could not stop the plane from crashing. [00:18.50]Those are the early findings from a report [00:22.22]released Thursday by the Ethiopian government. [00:26.26]The Boeing 737 Max 8 jet crashed on March 10 [00:32.97] just six minutes after taking off from Addis Ababa. [00:37.61] All 157 passengers and crew members died. [00:44.16]The Ethiopian government said it based its report [00:49.27] on flight data and cockpit voice recordings. [00:54.31]The plane's builder, Boeing, said it could not comment [00:59.83]until it studies the full report. [01:03.20]The company's 737 Max 8 jet has been criticized [01:08.91]since a Lion Air flight crashed off the coast of Indonesia last October. [01:16.50]That crash and the Ethiopian Airlines crash [01:20.61]have several similarities, aviation experts say. [01:25.84]At the center of the crash investigation [01:28.85]is the plane's flight-control system. [01:32.50]Boeing and U.S. officials have said [01:36.61]that pilots could regain control in emergencies [01:40.67]if they followed a series of steps. [01:44.25]Those steps include turning off a system designed [01:48.92]to prevent the plane from crashing. [01:52.14]This anti-stall system is known as MCAS. [01:57.60] It was designed especially for the Max model. [02:02.83]Ethiopian investigators did not name the MCAS system in their report. [02:09.79]But they recommended that Boeing examine [02:13.25]"the aircraft flight control system related to the flight controllability." [02:19.59]They also recommended that aviation officials [02:23.54]confirm that issues have been fully addressed [02:27.23]before permitting Max planes to fly again. [02:31.55]Boeing's 737 Max planes are currently [02:36.10]not permitted to fly anywhere in the world. [02:40.00] Boeing is working to fix the model's anti-stall system. [02:45.06]The change must be approved by the U.S. Federal [02:50.08]Aviation Administration (FAA) and other regulators. [02:54.65]The FAA said Monday that it expects Boeing's final software [03:00.67]improvements for 737 Max airliners "in the coming weeks." [03:05.73]The report did not say whether Ethiopian officials [03:09.91]were seeking only those software improvements [03:13.55]or whether they want a larger update to the Max's flight controls. [03:19.50]It is also not clear whether the Ethiopian pilots [03:23.98]followed all of Boeing's recommendations fully. [03:28.32] The pilots followed Boeing's instructions to disconnect the MCAS system. [03:35.38]But for a still-unknown reason, [03:38.42]the pilots then seemed to turn the system on again. [03:43.21]That information comes from an official familiar with the investigation, [03:49.08]who spoke with The Associated Press on Wednesday. [03:52.98]The official spoke on the condition of remaining unidentified [03:58.23]because Ethiopia's report had not yet been released. [04:03.31]Boeing's emergency instructions advise pilots to turn off the MCAS system [04:10.07]and to continue flying manually for the rest of the flight. [04:14.74]Ethiopian investigators did not talk about [04:18.69]that issue at their press conference Thursday. [04:21.96]They said the pilots had done what they were supposed to do. [04:27.30]In a statement Thursday, [04:29.32]Ethiopian Airlines said its pilots followed Boeing instructions. [04:35.66]The Ethiopian officials did not say whether the MCAS system [04:40.91]might have turned on again because of a broken sensor. [04:45.64]One of the sensors, called Angle of Attack, [04:49.64]did not work correctly in the Lion Air crash, [04:53.56]which turned that plane's MCAS system on again. [04:57.46]David Hasse is an aviation expert [05:01.50]and editor of the online publication airliners.de. [05:07.12]He said it is important that the report found the Ethiopian pilots [05:12.44] followed the correct steps provided by Boeing. [05:16.22]That finding links the case more closely to the Lion Air crash. [05:22.87]Hasse said, "What is special about this case [05:26.84]is that two crashes seem to have a very, very similar reason. [05:32.32]This is something that is very rare in aviation." [05:37.01]Hasse said he questions whether all Boeing 737 Max planes [05:43.14]should have been grounded after the Lion Air crash. [05:47.50]I'm Jonathan Evans.如果您也喜欢 恒星英语学习网 www.hxen.com 请与您的朋友分享...