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
National Airline History Museum condition is very time consuming and expensive. Although it can be easily viewed by the public, it is open for public access for special events only. A full-motion, working Lockheed L-1011 Tristar simulator was donated to the museum by Orbital Sciences Corporation; it was never installed and later removed from the museum's possession and transferred to a site in California . The museum also has a cockpit procedures trainer for the Lockheed L-1011 Tristar, originally belonging to Trans World Airlines. A general purpose, custom-built flight simulator occupies part of the main foyer of the museum. National Airline History Museum The