The National Transportation Safety Board said on Tuesday it will hold an investigative hearing in November about a midair incident in April in which an engine on a Southwest Airlines Boeing 737 exploded over Pennsylvania, killing one passenger.

The hearing will focus on the CFM International engine fan blade design and development history of the engine type that failed, as well as engine fan blade inspection methods, procedures and engine fan blade containment design and certification criteria. CFM is a joint venture of General Electric Co and France's Safran SA.