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
Airline (brand) Musical Instrument Company, and Harmony Company. Valco was notable for its flagship National and budget Supro guitar brands, which were in production until the company's demise in 1968. Valco Airline guitars have been played by a wide array of bands and artists including: J. B. Hutto, David Bowie, The Cure, PJ Harvey, Calexico and Jack White. Airline-branded amplifiers were also marketed. These were manufactured by Valco and Danelectro. The early 1960s JB Hutto Montgomery Airline model was reissued by Eastwood Guitars in the early 2000s under the name of the Airline DLX, after the company purchased the rights to the