LOUISVILLE, Ky. — There were no signs of issues with the UPS plane that crashed in Louisville on Nov. 4 until the plane began to rotate during takeoff, federal aviation investigators said Thursday.

Rotation is the term used when the nose tips up for takeoff.

In the National Transportation Safety Board’s (NTSB) newly released preliminary report on the crash, “fatigue cracks” and areas of “overstress failure” were found on crucial components of the plane that connected its left wing and engine.

The MD-11F uses "pylons" which are long metal structures that connect the engine to the underside of the wing.

Investigators said the pylons attach to each wing with several parts, including a forward mount bulkhead (forward mount) and an aft mount bulkhead (aft mount).

Credit: Boeing, edited b

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