Accidents
FAA Issues Emergency AD on CFM56 Turbofans
Airworthiness directive to mandate ultrasound inspections of engine type involved in uncontained failure aboard Southwest Airlines 737
A member of the NTSB go team investigating the uncontained failure of a CFM56-7B turbofan on a Southwest Airlines 737-700 examines fan blade damage on the engine in question. (Photo: NTSB)
A member of the NTSB go team investigating the uncontained failure of a CFM56-7B turbofan on a Southwest Airlines 737-700 examines fan blade damage on the engine in question. (Photo: NTSB)

Following the April 17 fan blade separation in a CFM56-7B powering a Southwest Airlines Boeing 737-700, the FAA issued an emergency Airworthiness Directive (AD) calling for ultrasound inspections of the affected engines’ fan blades. An AD had been expected as it was proposed in response to a fractured fan blade that caused an uncontained engine failure of a CFM56-7B on a Southwest Airlines 737-700 on Aug. 27, 2016.


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