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
No. 1586 (Polish Special Duties) Flight special transport bombers. On 4 November 1943, Flight became No. 1586 (Polish Special Duties) Flight at RAF Derna Libya. It was still named locally by their ex 301 crews and Polish authorities as No. 301 Squadron Land of Pomerania. On 22 December 1943, the Polish flight was transferred to Campo Cassale near Brindisi, Italy, from where it flew above the occupied Europe with special duties. Missions flown by the flight included partisan supply drops and agent insertion. A special effort was undertaken to supply Polish insurgents after an outbreak of Warsaw Uprising in August 1944. Flights to central Poland were