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
Virtual airline (hobby) Virtual airline (hobby) A virtual airline (VA) is a dedicated hobby organization that uses flight simulation to model the operations of an airline. Virtual airlines generally have a presence on the Internet, similar to a real airline. Many hundreds of virtual airlines of significance are currently active, with tens of thousands of participants involved at any one time. Virtual airlines were started to give a sense of purpose to activities conducted within a flight simulator program, the first being SubLogic's "", released in 1990. As time has passed, the most common flight simulator used is Microsoft's Flight Simulator. This basic