美国坠毁货机关键部件发现金属疲劳迹象

Core Viewpoint - The NTSB has found evidence of metal fatigue cracks in key components of the McDonnell Douglas MD-11 cargo plane that crashed, leading to a temporary grounding of all MD-11 aircraft by the FAA [1][1][1] Group 1: Incident Details - A UPS McDonnell Douglas MD-11 cargo plane crashed shortly after takeoff from Louisville International Airport in Kentucky on November 4, resulting in 14 fatalities [1] - The NTSB reported that most of the structure of the left engine pylon remained connected to the engine but had separated from the wing during the accident [1] Group 2: Investigation and Regulatory Response - Investigators discovered signs of metal fatigue cracks on the components connecting the engine to the wing [1] - The FAA issued a grounding order for all MD-11 aircraft on November 8 to establish new engine inspection procedures, with the investigation still ongoing [1]