Russian investigators are trying to reconstruct the last moments of an Avis-Amur Antonov An-12 using flight-data recorder information, because the cockpit-voice recorder is badly damaged.
The aircraft (RA-11125) came down in the vicinity of Magadan on 9 August.
Russia's Interstate Aviation Committee (MAK) said it had restored information from the flight-data recorder. "Analysis and evaluation of the crew's actions during the emergency is being based on the [flight-data recorder] records," it added.
MAK pointed out that parts of the cockpit-voice recorder are "badly damaged" and other components are missing. Investigators are working to restore the recorder and assess whether it contains a record of the accident.