Boeing CEO says 737 MAX software fix and training revision in ‘finalisation’

Boeing Chairman, President and CEO Dennis Muilenburg, on Sunday, confirmed that the company was finalising its “development of a previously-announced software update and pilot training revision that will address the MCAS flight control law’s behavior in response to erroneous sensor inputs”.


The Maneuvering Characteristics Augmentation System (MCAS) was developed by Boeing to make the newest version of its best selling 737 jetliner behave like earlier versions. However, faults in the system are suspected to have caused the fatal crashes of two 737 MAX aircraft in less than five months. The first crash was of Lion Air flight 610 on October 29, 2018 near Jakarta which killed all 189 passengers and crew. The second was of Ethiopian Airlines flight 302 on March 10, 2019 near Addis Ababa killing all 157 passengers and crew. In both cases the crashes occurred soon after take-off.

Earlier in the day, the Ethiopian authorities had said that there were clear similarities between the Lion Air crash and the Ethiopian Airlines crash based on initial investigation of the flight data recorder.

Boeing statement

Mr. Muilenburg’s statement said

First and foremost, our deepest sympathies are with the families and loved ones of those onboard Ethiopian Airlines Flight 302.

Boeing continues to support the investigation, and is working with the authorities to evaluate new information as it becomes available. Safety is our highest priority as we design, build and support our airplanes. As part of our standard practice following any accident, we examine our aircraft design and operation, and when appropriate, institute product updates to further improve safety. While investigators continue to work to establish definitive conclusions, Boeing is finalizing its development of a previously-announced software update and pilot training revision that will address the MCAS flight control law’s behavior in response to erroneous sensor inputs. We also continue to provide technical assistance at the request of and under the direction of the National Transportation Safety Board, the U.S. Accredited Representative working with Ethiopian investigators.

FAA being probed

The certification process of the 737 MAX is also under cloud. The Wall Street Journal reported that the U.S. Department of Transportation is investigating the aircraft’s approval by the U.S. aviation regulator, the Federal Aviation Administration (FAA). The Journal says, the inquiry focuses on whether the FAA used appropriate design standards and engineering analyses in certifying the aircraft’s anti-stall system known as MCAS.

Clearly Mr. Muilenburg and Boeing have some trying times ahead.

As usual, we invite you to share your thoughts via a comment.

About Devesh Agarwal

A electronics and automotive product management, marketing and branding expert, he was awarded a silver medal at the Lockheed Martin innovation competition 2010. He is ranked 6th on Mashable's list of aviation pros on Twitter and in addition to Bangalore Aviation, he has contributed to leading publications like Aviation Week, Conde Nast Traveller India, The Economic Times, and The Mint (a Wall Street Journal content partner). He remains a frequent flier and shares the good, the bad, and the ugly about the Indian aviation industry without fear or favour.

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