The jet did not experience technical malfunctions prior to the catastrophe, Russian Emergencies Minister Vladimir Puchkov said Tuesday.
"The flight recorder has been transcribed. The transcript indicates that all technical systems functioned properly," Puchkov told reporters.
The Interstate Aviation Committee (IAC, MAK), an airline safety watchdog, is thoroughly investigating the causes of the crash, he added, noting that investigation results will be made public.
The plane went missing last Friday after failing to make scheduled contact with rescuers. TheIl-76 jet crashed while on a fire-fighting mission near the Russian city of Irkutsk. All ten crew members died in the crash. The last of the bodies were pulled from the charred wreckage earlier in the day. The black boxes received thermal damage.
