NTSB: UPS MD-11F pylon bearing fatigue cracks were reported repeatedly—10 times—before fatal engine separation
NTSB testimony on the UPS MD-11F crash indicates the left engine’s pylon failure stemmed from fatigue cracking in the pylon bearing area. Investigators found the same part had fractured 10 times previously and that multiple alerts were not acted on. The hearing also scrutinized FAA, Boeing, UPS and maintenance inspection/reporting processes dating back to 2002.