The Federal Aviation Administration on Friday proposed fining Boeing $3.1 million for safety violations in the months leading up to the Alaska Airlines 737 MAX panel blowout last year.

The regulator said it “identified hundreds of quality system violations” at the manufacturer’s Renton factory and its supplier Spirit AeroSystems between September 2023 and February 2024.

That September, a fuselage made its way through Spirit’s Wichita, Kan., factory, where workers construct the 737 MAX fuselages before shipping the structures to Boeing’s Renton plant for final assembly.

In January 2024, a panel flew off that fuselage in midflight, leaving a hole in the side of the plane.

The FAA did not provide more detail Friday on the quality system violations it found in Boeing’s operations during th

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