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
National Association of Letter Carriers National Association of Letter Carriers The National Association of Letter Carriers (NALC) is an American labor union, representing non-rural letter carriers employed by the United States Postal Service. It was founded in 1889. The NALC has 2,500 local branches representing letter carriers in all 50 states, the District of Columbia, Puerto Rico, the Virgin Islands and Guam. Letter carriers were the first postal workers to form their own union. They had tried to organize a national union at least three times—in 1870 in Washington, DC, in 1877 in New York City, and in 1880 again in New York City. Recognizing