Ptkay,
With respect, I have to disagree here. At present we have absolutely no indication that a technical malfunction could have played part (and the same is true for the DME Tu 204). There were reports of wreckage found far away from the main impact site, but the CNN footage clearly shows flap parts and broken trees at that point, all in accordance with the initial statements from the investigating committee that the initial ground contact was hitting a lone tree, severing the wingtip.
At present unfortunately all KNOWN pieces of information point towards a perfectly sound airplane having been flown into the ground - something that happened before, and unfortunately as long as we have humans at the controls, will happen again.
As for the D-30K engines, indeed early on it did have a bad track record on the IL6, however I am not aware of any loss of control event on the TU5M due to an uncontained failure, and the world's rather large Il-76 fleet is also powered by that. Let's not bring the PS-90 (Tu-204) into the picture, that is an entirely different new design, no relation to the old D-30. We do know that the engines were also overhauled just a few months ago (actually 'rebuilt' is more the word, a D-30 overhaul involves the replacement of practically all moving parts).
I am still waiting for any credible reports on what kind of approach was flown, and whether ground control / the crew were within legal bounds in permitting / commencing the approach. As this was a Russian military field and a Polish airforce plane, we must keep in mind that 'legal' may have been very different from what would be so under EU airline ops standards.