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
Janet (airline) similar openings. Janet flights operate with a three-digit flight number and a "WWW"-prefix. In the official publication of ICAO airline codes, this specific three-letter designator is listed as being blocked. Common Janet destinations, mostly military, include: The first flights from Las Vegas to Area 51 were performed in 1972 by a Douglas DC-6 operated by EG&G. A second Douglas DC-6 was added in 1976 and this type remained in use until 1981. As of mid-2015, the Janet fleet consists of six Boeing 737-600s painted white with a prominent red cheatline. There are also five smaller executive turboprops (two Beechcraft 1900s