LOT Polish Airlines Flight 5055 accident's cause was similar to that of LOT Polish Airlines Flight 007's crash seven years earlier. After the disaster of Flight 007, the Polish investigatory commission established that its engine shaft disintegration was the result of metal fatigue; improper alloy preparation resulting in a defective mechanism which was less resistant to fatigue; and a faulty design of the engine shaft. Detection of these faults was possible only after complete disassembly of the engine and detailed analysis of all its elements, and as such was beyond the capabilities of aircraft maintenance personnel. These concerns were addressed by the Polish Government's Special
American Eagle (airline brand) American Airlines Group, and acquired through the merger with US Airways, was operating a fleet of Bombardier (formerly de Havilland Canada) DHC-8 Dash 8 turboprops for the US Airways Express regional brand. These aircraft had already been rebranded as American Eagle since the merger process is now fully complete. American Eagle (airline brand) American Eagle is an American brand name for the regional branch of American Airlines, under which nine (seven from 2019) individual regional airlines operate short- and medium-haul feeder flights. Three of these airlines, Envoy Air (formerly American Eagle Airlines), Piedmont Airlines, and PSA Airlines, are wholly owned