Concerns about 737 MAX procedures deepen

Ethiopian Airlines crash site
Ethiopian Airlines CEO Tewolde GebreMariam visits the accident scene hours after the catastrophic March 10 crash. (Ethiopian Airlines Photo via Twitter)

Readings from the recorders recovered from last month’s crash of an Ethiopian Airlines Boeing 737 MAX jet reportedly suggest that the pilots tried using the recommended procedure for overriding a balky automated flight control system — but that the system was re-engaged and forced the plane into its fatal dive.

The reports by The Wall Street Journal and Reuters, based on interviews with unnamed sources who have been briefed on the post-crash investigation’s preliminary findings, raise deeper questions about the safety of the flight control system, known as the Maneuvering Characteristics Augmentation System, or MCAS.

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By Alan Boyle

Mastermind of Cosmic Log, contributor to GeekWire and Universe Today, author of "The Case for Pluto: How a Little Planet Made a Big Difference," past president of the Council for the Advancement of Science Writing.

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