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
Letter of Reconciliation of the Polish Bishops to the German Bishops 1000 years of the baptism of Poland. Most German linguists were forced to sign a letter of protest; those who refused were fired from their universities. In addition, the authorities twice refused permission for a planned visit of Pope Paul VI to Poland in 1966. The following year the Polish United Workers' Party planned to limit the number of religious schools, which was also seen as a penalty for the Letter of Reconciliation. The anti-church campaign lasted until Gomułka's downfall in 1970. Letter of Reconciliation of the Polish Bishops to the German Bishops The Pastoral Letter of the Polish Bishops