Southwest Airlines Flight 1380 The United States National Transportation Safety Board declares metal fatigue caused a fan blade failure that killed a passenger on April 16, the same issue behind a similar accident on another Southwest Airlines Boeing 737 in 2016. The Federal Aviation Administration announces mandatory ultrasonic inspections on fan blades fitted to CFM56-7B engines of which around 8,000 are flying worldwide. Jet engine blast linked to prior accident © BBC News Sources: BBC News
