DTR2, et al
The assumption is that the design and certification standard of the Russian aircraft matched those of comparable western types; this may not be so.
A very enlightening 2 weeks flying with a Russian test pilot, to approve a western 4 engined aircraft for their use, identified significant differences in standards.
The test pilot had been involved with the IL-76 and a comprehensive range of large Russian aircraft, but had not flown other western types (the test engineer had). Questioning the western type revealed surprising features of the IL-76; how fast can engine power be changed, how to alleviate foot forces with bank, can flaps be moved during a turn, can altitude be maintained on 3 engines after takeoff.
On top of which, consider the training required and crew experience in this particular situation.