After a few years of flying "older" aircraft I soon learnt that my ears were far more important than the RPM gauges, even whe they are electronic and reading exactly the same, down to the last rpm, and yet you still think you are part of a WW2 bomber stream.
Anyway back on thread.
A real shame and a waste of life like any aircraft accident. I have no idea why it went down or the reasons and wouldn't want to speculate on it.