LOT Polish Airlines Flight 7 increased engine wear, since the engines were under greater load. NK-8-4 engines were not reliable enough. Warranty service life was only 5000 hours, and about half of LOT engines failed after 2000–3000 hours. Because of this, Polish pilots often called the Il-62 "flying coffins". In spite of the low reliability, the airline decided to increase overhaul life intervals to reduce the frequency of repairs, which were carried out in Soviet factories and quite expensive. LOT sent a letter to the Ilyushin Design Bureau containing the results of a test in which it was found that the engines could operate normally
Iberia (airline) airline with a flight Madrid-Lisbon. In 1940 the government gave the monopoly of national air transport to Iberia (this fact changed 6 years later when the government liberalizate the national air traffic for the private airlines), this privilege helped the company to start building as an important international airline, which had not been until then. The airline was nationalised on 30 September 1944 and became part of Instituto Nacional de Industria. The policy of the company was to separate itself from the German orbit to which it had been linked in its first years, and establish relations with the United