Nov. 20 (UPI) -- Fatigued and overly stressed connecting hardware likely caused the left engine to detach from a UPS cargo plane that crashed on Nov. 4 in Louisville, Ky., the National Transportation Safety Board announced on Thursday. The NTSB's preliminary report says cracks caused by fatigue and signs of excessive mechanical stress were found in the connecting hardware that held the left engine to the wing, CNN reported . "We continue to grieve for the lives lost in the tragic accident

Tag-uri: accident