The cause of the accident could not be determined, but the investigation commission suspected a possible failure of the MSRP-12 radar on the aircraft may have led the crew to be unaware of their position.
^"Public-transport accidents". Flight International: 1547. 12 June 1976. Archived from the original on 6 November 2012. Retrieved 10 September 2012. An Aeroflot Tu-154 is missing on a flight from Luanda to Malabo, Equatorial Guinea, as we go to press. It is reported to be carrying a total of 46 crew and passengers.