Ethiopian aviation authorities discussed a preliminary report on the Ethiopian Airlines crash at a press conference Thursday, concluding that the pilots did everything they were trained to do to regain control of the plane.CNN aviation analyst Mary Schiavo has criticized the Federal Aviation Administration (FAA) for its oversight of Boeing.The FAA has come in for criticism for its role in approving the Boeing 737 Max aircraft that were involved in fatal crashes in Indonesia and Ethiopia.Schiavo questioned the quality of the FAA's oversight of Boeing and claimed that the administration's previous reputation for excellence has been tarnished.There should be triple redundancy for different systems to ensure safety, said Schiavo, but the MCAS software systems aboard both crashed Max 8s were fed by only one angle of attack (AOA) sensor.Schiavo claims this reliance on just one sensor begs the question as to why Boeing didn't originally build the planes with two AOA sensors, and why the FAA did not require it.Another issue with the 737 Max is its tendency to point slightly upward due to the use of larger engines which altered its aerodynamics compared to previous 737s.Boeing tried to remedy this using the MCAS software, but Schiavo questioned why the FAA approved a software fix for the issue. H��T�k�@~7������ٗ�A)$�ѭ0hWCJ��I
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This report stated that the left and right angle of attack (AOA) values deviated by 59°. was the aircraft on automatic pilot or was the aircraft flown manully ? What I’m saying is you can pull back as hard as you like on the yolk but when the stab trim is trimming opposite, then the larger stab will essentially force the plane into a dive.“When the MAX returns to the skies with the software changes to the MCAS function, it will be among the safest airplanes ever to fly” Muilenburg said. The right over-speed clacker activated. Shortly after takeoff, the Angle of Attack sensor recorded value became erroneous and the left stick shaker activated and remained active until near the end of the flight. she said.During a press conference Thursday, Ethiopian investigators looking into the Ethiopian Airlines crash in March said the pilots were qualified and operated the plane as Boeing intended, even down to trying to override an anti-stall software known as MCAS.CNN anchor and aviation expert Richard Quest believes that Boeing is under pressure following the press conference, despite its excellent reputation. The FDR data also indicated that the crew utilized the electric manual trim to counter the automatic AND input,” the preliminary report said.“The crew performed runaway stabilizer checklist and put the stab trim cutout switch to cutout position and confirmed that the manual trim operation was not working.”Ethiopian Airlines group chief executive Tewolde GebreMariam noted the report showed the pilots followed the recommended procedures in response to the repeated nose-down commands.“We are very proud of our pilots’ compliances to follow the emergency procedures and high level of professional performances in such extremely difficult situations,” GebreMariam said in a statement in response to the release of the preliminary report.The initial findings regarding what happened on ET302 indicated similarities with what occurred in October 2018, when a Since the Lion Air accident, attention has focused on the 737 MAX’s Maneuvering Characteristics Augmentation System (MCAS), an anti-stall feature that is not present on older versions of the 737 platform.The software update added additional layers of protection from erroneous data out of the aircraft’s angle of attack (AOA) sensors, Boeing said.Boeing chief executive Dennis Muilenburg acknowledged that the MCAS was activated in response to erroneous angle of attack information in both the Ethiopian Airlines and Lion Air tragedies.“The history of our industry shows most accidents are caused by a chain of events,” Muilenburg said in a statement after the release of the AAIB preliminary report.“This again is the case here, and we know we can break one of those chain links in these two accidents.“As pilots have told us, erroneous activation of the MCAS function can add to what is already a high workload environment. About 12 seconds later, the autopilot disengaged. "Why was MCAS put in to solve what looks like a center of gravity problem, a pitch up problem?" 1374 0 obj
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how much physical force required to pull out of a dive ? Ethiopian authorities will deliver their first report on the crash of Ethiopian Airlines Flight 302 on Thursday. On March 10, 2019, at 05:38 UTC, Ethiopian Airlines flight 302, Boeing 737-8(MAX), ET-AVJ, took off from Addis Ababa Bole Int. “The data indicates that aft force was applied to both columns simultaneously several times throughout the remainder of the recording.” The report does not specifically name the Maneuvering Characteristics Augmentation System, which is a stabilization system, but makes it likely the MCAS pushed the plane into a dive fueled by erroneous angle of attack sensor readings. I think the 737MAX has maxed out. Ethiopian Airlines flight 302 crashed in an open field six minutes after take-off from Addis Ababa, the Ethiopian capital.