![]() The Indonesia National Transportation Safety Committee’s report was published Octoand included recommendations for Boeing, the FAA, Lion Air and its subsidiaries, and the Indonesian civil aviation agency. Recommendations in the preliminary report focus on the issues with the flight control system that caused the nose of the plane to dip down. The Ethiopia Accident Investigation Bureau has released a preliminary investigation report. As an accredited representative, the NTSB participated in the investigations. In both incidents, the MCAS received incorrect data from the sensors and forced the plane’s nose down.īecause the crashes happened abroad, the NTSB did not lead the investigations but it was an accredited representative to both investigations. The MCAS was intended to lower the nose of the plane when sensors detected that the nose was pointed too far up. ![]() To resolve the issue, Boeing installed the Maneuvering Characteristics Augmentation System (MCAS) into the 737 Max. However, the new placement of the engine caused the nose of the plane to point too far up when the plane was in full thrust, as it is during take off. Boeing’s solution was to fit the engine higher up on the plane. The Boeing 737 model was too low to the ground–a characteristic that made it able to service smaller airports with less landing equipment–to fit a new engine under the wings of the plane. The key difference between the older Boeing 737 model and the 737 Max was the larger, updated engine. The Lion Air investigation was led by the National Transportation Safety Committee of Indonesia, and the Ethiopian Airlines investigation was led by the Ethiopia Accident Investigation Bureau. Both flights were flying the Boeing 737 Max 8 plane. Less than a year later, on March 10, 2019, Ethiopian Airlines flight 302 crashed near Ejere, Ethiopia, six minutes after take off. Lemme said the planned software change will resolve the microprocessor glitch and increase the reliability and safety of the Maneuvering Characteristics Augmentation System, which malfunctioned on both of the crash flights.īoeing plans to have its new software architecture ready for testing by the end of September, according to the report.Lion Air flight 610 crashed into the Java Sea after departing from Jakarta, Indonesia on October 29, 2018. "This is a huge deal," Peter Lemme, a former flight-controls engineer at Boeing, told the publication. In the past, the aircraft relied on only one computer during the flight. The change will allow the aircraft’s system to take input from both flight-control computers. In response to the identified glitch, the Times reports Boeing plans to change the Max flight-control system’s software architecture. The FAA also identified a possible glitch with the flight-control computer’s microprocessor, the report said. The FAA ruled that out in June, the report said, when while testing of the effect of a computer hardware glitch, one in three pilots in a simulation could not save the plane. The Seattle Times reports the FAA rejected Boeing’s assumption that pilots can serve as the “backstop safeguard” in emergency situations, including such as uninstructed movement of the horizontal tail. Boeing is making changes to the 737 Max flight-control system’s software architecture after the FAA discovered potential issues during its June testing, according to a report.
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