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
The Airline Cooperative these are all primarily acting as Trade associations, with a vertical structure that focuses on Political Lobbying at the top. The Airline Cooperative instead focuses on peer-to-peer communication, with Airlines talking directly to each other on key focus areas such as Security, Flight Operations, Route information, Large-scale ATC and Weather events, Emergency Response Planning, and Ground Handling issues. The initial members of The Airline Cooperative came together in 2012, to run a beta-test involving sharing information across the Flight Operations departments of the member airlines. In 2014, the group had expanded to 80 member airlines. In 2015, the group reached