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 (brand) National (brand) Neither National Semiconductor nor National Car Rental are related to Panasonic or the "National" brand. Before present-day Panasonic produced appliances under the name, the National brand was first used by Konosuke Matsushita's electric firm to sell his battery-powered bicycle lamps, hoping that they would be a product used by all of Japan, hence the name "National". It was arguably the first well-known brand of Japanese electronics. National was formerly the premier brand on most Matsushita products, including audio and video and was combined in 1988 as National Panasonic after the worldwide success of the Panasonic name. After 1980