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
Malaysian Airline System Flight 684 Malaysian Airline System Flight 684 Malaysian Airline System Flight 684 was an international flight from Singapore Changi Airport, Singapore to Subang International Airport, Kuala Lumpur, Malaysia. On 18 December 1983 the Airbus A300 operating the flight crashed 2 km short of the runway at Kuala Lumpur Airport, Malaysia with no fatalities among the 247 passengers and crew. Malaysian Airline System Flight 684 departed Singapore Changi Airport in Changi, Singapore on 18 December 1983 at 18:53 local time. As the flight approached Subang International Airport (now Sultan Abdul Aziz Shah Airport) in Subang, Selangor, Malaysia at 19:20 local time, it was