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Southwest 1380

Printed page 1. PDF page 17.

afterward, the No. 1 (left) engine's fan and core speeds decreased, and the engine's vibration parameters increased. 4 During postaccident interviews, the flight crewmembers reported that they heard a loud “bang” and felt significant airplane vibration. FDR data also sh
Open official document at PDF page 17Left Engine Failure and Subsequent Depressurization: Southwest Airlines Flight 1380, Boeing 737-7H4, N772SW, Philadelphia, Pennsylvania, April 17, 2018

Southwest 1380

Printed page 4. PDF page 20.

checklist speed (VMO, the maximum operating speed) to reduce the severity of the airframe vibration. 16 The approach controller asked the flight crewmembers if they planned to “go right in” or needed “extended final,” and the captain replied, “extended final.”
Open official document at PDF page 20Left Engine Failure and Subsequent Depressurization: Southwest Airlines Flight 1380, Boeing 737-7H4, N772SW, Philadelphia, Pennsylvania, April 17, 2018

Southwest 1380

Printed page 52. PDF page 68.

Damage or Separation checklist should be accomplished if an engine fire warning, airframe vibrations with abnormal engine indications, and/or an engine separation occur. The three-page checklist, which had 14 items, is shown in figure 17. The first five items on
Open official document at PDF page 68Left Engine Failure and Subsequent Depressurization: Southwest Airlines Flight 1380, Boeing 737-7H4, N772SW, Philadelphia, Pennsylvania, April 17, 2018

Southwest 1380

Printed page 84. PDF page 100.

descent without additional airspeed (which the captain was avoiding due to airplane vibration) and could have facilitated a quicker landing at MDT, which was the geographically closer airport at the time. (The flight crew's selection of PHL as the emergency
Open official document at PDF page 100Left Engine Failure and Subsequent Depressurization: Southwest Airlines Flight 1380, Boeing 737-7H4, N772SW, Philadelphia, Pennsylvania, April 17, 2018

Southwest 1380

Printed page 85. PDF page 101.

given the increased background noise recorded on the CVR and the significant airplane vibration reported during flight crew postaccident interviews. Six seconds after the captain requested a vector to the closest airport, the CVR recorded the controller providing the vec
Open official document at PDF page 101Left Engine Failure and Subsequent Depressurization: Southwest Airlines Flight 1380, Boeing 737-7H4, N772SW, Philadelphia, Pennsylvania, April 17, 2018

Southwest 1380

Printed page 113. PDF page 129.

of oxygen we're below ten thousand feet. 11:12:36 HOT-2 okay choose one high airframe vibration occurs and continues after shutdown. 11:12:47 CAM-1 you know what? you really should. 113
Open official document at PDF page 129Left Engine Failure and Subsequent Depressurization: Southwest Airlines Flight 1380, Boeing 737-7H4, N772SW, Philadelphia, Pennsylvania, April 17, 2018