Tec
With all due respect, as a/c systems have become more complex it is surely becoming beyond the capabilities of “local” engineers to be able to comment on all systems of an imported a/c – unless you are capable of building such yourselves is it not the case that much has to be accepted “off the shelf”? Have not many problems arisen when an “off the shelf” a/c design has been subject to too much local change (eg HC3 Chinook)?
In the case of ZD576, you do not have a clear malfunction to assess – indeed, there is no evidence whatsoever of a malfunction contributing to the crash nor any window of opportunity for any such to have occurred during a phase of the flight where they had already put themselves in a situation that either was bad airmanship (the official view) or requires further inquiry into the reason for it (my view).
If a fraction of the effort put into the airworthiness aspect had been put into analysing the several anomalous flight parameters that to date have hardly been addressed at all perhaps the reasons for their actions would have become apparent.