Boeing brings new clarifications

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CHICAGO, October 25, 2019 – Boeing made the following statement following the publication today of the final investigation report by the National Transportation Safety Committee (KNKT) regarding the Lion Air 610 flight:

"On behalf of all Boeing employees, I extend our sincere condolences to the families and loved ones of the people who died in these accidents. We share the mourning of Lion Air and extend our deepest condolences to the Lion Air family, "said Dennis Muilenburg, Boeing's Chief Executive Officer. "These tragic events touched us all deeply, and we will never forget what happened. "

"We commend the work done by the KNKT, the Indonesian Committee for Transport Safety, and the considerable efforts made to determine the circumstances of this accident and the factors that have contributed to it, as well as its recommendations aimed at achieving our goal. the common objective of ensuring that such accidents can not happen again.

We thank the KNKT for their safety recommendations and take the necessary steps to improve the safety of the 737 MAX and prevent the occurrence of flight control conditions during this accident from recurring. never. Safety is an enduring value for all Boeing employees, and the safety of our customers, passengers and crew onboard our aircraft remains our top priority. We value the long-standing partnership with Lion Air and look forward to continuing to work together in the future. "

Boeing's experts, who act as technical advisors to the National Transportation Safety Board (NTSB), provided KNKT with assistance throughout the investigation. Group engineers have worked with the US Federal Aviation Administration (FAA) and other regulatory authorities around the world to perform software updates and other changes that take into account information gathered through of the KNKT investigation.

Since that accident, the 737 MAX and its software have been subjected to unprecedented levels of testing, analysis and monitoring by international regulators. This process includes several hundred simulation and flight test sessions, regulatory analysis of thousands of documents, reviews by regulatory authorities and independent experts, and a comprehensive review of requirements. certification.

Over the past few months, Boeing has made changes to the 737 MAX, specifically changing the way AOA (Angle of Attack) impact sensors operate with flight control software functionality called Maneuvering Characteristics (MCAS). Augmentation System) used to automatically control the attitude of the aircraft. From now on, the MCAS system will compare information from both AoA probes before activating, adding an extra layer of protection.

In addition, the MCAS system will only activate if both AOA incidence probes send identical information, will only activate once in case of erroneous information sent by the AOA probes, and will always be subject to a limit. maximum that can be overridden by the driver by pulling on the stick.

These software modifications will prevent the flight control conditions that appeared during the accident from occurring again. In addition, Boeing is updating flight crew manuals and pilot training so that each pilot will have all the information they need to fly the 737 MAX safely.

Boeing continues to work with the FAA and other regulatory authorities around the world to certify the software update and training program to ensure the safe return of the 737 MAX.



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