The Aeroflot Nord Boeing 737 which crashed in Russia's Perm region four days ago took off from Moscow with technical faults, according to reports in Russia. It has been suggested the jet's throttle and collision avoidance systems were not operating.
It's not known whether the faults led to the crash in which 88 people died. Investigators have decoded the data from the Boeing's two 'black box' flight recorders, and are continuing their probe into the causes of the crash.