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

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 engines of the MD-11 cargo plane are attached to the underside of pylons which are also attached to the underside of each wing, the NTSB explained.

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).

A clevis on the underside of each w

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