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NTSB notes metal fatigue in Southwest engine failure

Photo: Dominick Reuter/AFP/Getty Images

The terrifying engine loss on a Southwest flight may have been caused by a fan blade that broke off from one of the two engines, per the Philadelphia Inquirer.

Why it matters: Less than a year ago, the FAA and the engine’s manufacturer drew attention to problems with metal fatigue on the fan blades in the CFM56 engine series, which this plane has, after a similar incident in 2016, also a Southwest plane.