Accident Overview - NTSB photos show the left engine and pylon detaching from the UPS plane's wing during takeoff, leading to a massive fire and fatalities both on the plane and on the ground [1] - The accident shares "haunting similarities" with a 1979 crash involving a previous model of the same plane, which also resulted in total loss of life [2] - Fatigue fractures were found in the pylon structure holding the engine to the wing [2] Investigation and Regulatory Response - The FAA previously ordered regular inspections of similar planes after a 191 American Airlines Flight experienced a similar engine and pylon detachment due to maintenance damage [3] - The UPS plane, built in 1994, underwent routine maintenance in October but was not yet due for a heavy detailed pylon inspection [4] - The NTSB is challenged with determining the specific cause of the engine and pylon detachment in the UPS crash [4] Operational Impact - The MD11 aircraft, relied upon by both FedEx and UPS, has been grounded, impacting their operations [4] - Both FedEx and UPS are using smaller planes, relying on partner airlines, and utilizing ground transport options to mitigate shipping delays [5] - The companies hope to resume normal operations approaching Christmas [5]