Would psychiatric evaluation work?
IGh
no recorded case of BOTH the CVR AND the FDR being rendered inoperative by a hi rate dive.(Egypt Airs recorders worked till impact)
In this case also they were working just fine till before the event started.(in the examples given by IGh,they were either not working to start with ,or had a similar signature to being intentionally erased.)
One would expected that even if there was a catastrophic failure of some kind,the recorders should have continued to work till the upset actually started,and not stop a little before.
This would require a scenrio where the catastrophic failure resulted in electrical power loss only to the recorders(the transponder was workng till impact) But allowed the A/c to have a normal trajectory for a few seconds/minutes then strat a dive which can only be simulated with deliberate human intervenion .
As in the case of Egypt Air,national concerns seem to have scutled a competent report(and national lobies can be as powerful as manufactuers lobies)
What needs to be adressed is, if a psychiatric evaluation a foolproof method of detecting/ preventing such events .