The National Transportation Safety Board released dramatic frame-by-frame photos on Thursday showing an engine of the UPS cargo plane detaching shortly before the aircraft crashed in Louisville, Kentucky, earlier this month, killing 14 people.

The six images, released as part of the NTSB's preliminary investigative report into the crash, show the left engine separating from the left wing and a fire igniting as the plane began to lift off the ground.

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Three of the cargo plane's crew members died in the crash, which happened just outside of the Louisville Muhammad Ali International Airport on Nov. 4.

The Federal Aviation Administration has grounded all McDonnell Douglas MD-11s, the plane’s model, in the aftermath of

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