Ist denn klar, ob es wirklich das Bauteil war bzw. was der Grund für dessen Versagen ist
Der Zwischenbericht des NTSB schließt jedenfalls darauf. Materialermüdung, bei einem lang bekannten Problem, welches man nicht für relevant hielt seitens Boeing und FAA.
Crash: UPS MD11 at Louisville on Nov 4th 2025, burst into flames on takeoff
ZitatThe NTSB Materials Laboratory in Washington, DC, has subsequently examined this spherical bearing assembly. Investigators observed that the interior surface of the bearing’s race had fracture surfaces that showed evidence of fatigue cracking originating around the entire circumference at the edge of the design recess groove (a design feature on the interior surface of the race). The fatigue cracking extended through the thickness of the bearing race toward the exterior surface, encompassing about 75% of the fracture surface, with the remaining fracture surface consistent with overstress failure (see figures 2 and 3). Remnant grease-like material was found within the spherical bearing assembly (that is, between the ball element and the bearing race).






















































































