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
Royal Flight (airline) Royal Flight (airline) Joint stock company Royal Flight airlines (), formerly Abakan-Avia (), is a charter airline based in Abakan, Russia. It operates charter services between Russian cities and holiday destinations in Sri Lanka, Egypt, Thailand, Turkey, India, Indonesia, United Arab Emirates, Bulgaria, Macau, Taiwan, Maldives, and Vietnam. Its main bases are Abakan Airport (ABA) and El Obeid Airport, Sudan. The airline was established in 1992 as Abakan-Avia and started operations in 1993. It was established from a former Aeroflot unit, and started domestic cargo flights in 1993 and international flights in 1994. Sobol acquired a 70% share in 1999.