Boeing reportedly left out safeguards for 737 MAX that were present in an earlier version of flight control system

Boeing 737 Max.
(Image credit: Stephen Brashear/Getty Images)

Engineers who worked on the Boeing 737 MAX's flight control system, MCAS, which accident investigators have implicated in two deadly crashes in Indonesia and Ethiopia that killed a combined 346 people, omitted key safeguards that had been included in an earlier version of the same system that was used on a military tanker jet, The Wall Street Journal reports.

The engineers who designed the system for the military plane over 10 years ago reportedly made sure it relied on input from multiple sensors and limited power to move the plane's nose. One person familiar with the design said those checks were deliberate to prevent the system from acting erroneously or causing the pilot to lose control. "You don't want the solution to be worse than the initial problem," the person said.

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Tim O'Donnell

Tim is a staff writer at The Week and has contributed to Bedford and Bowery and The New York Transatlantic. He is a graduate of Occidental College and NYU's journalism school. Tim enjoys writing about baseball, Europe, and extinct megafauna. He lives in New York City.