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
American Eagle (airline brand) American Eagle (airline brand) American Eagle is an American brand name for the regional branch of American Airlines, under which nine (seven from 2019) individual regional airlines operate short- and medium-haul feeder flights. Three of these airlines, Envoy Air (formerly American Eagle Airlines), Piedmont Airlines, and PSA Airlines, are wholly owned subsidiaries of the American Airlines Group. Prior to the Airline Deregulation Act in 1978, most major US air carriers had maintained close relationships with independent regional carriers in order to feed passengers from smaller markets into the larger cities, and, in turn, onto the larger legacy carriers. In the