Zalt
I think you are confusing the argument here. With the exeception of this one very tragic accident, the S76 has had excellent reliablity from its blades. I think that Sikorsky were quite right not to equip the aircraft with a BIM system.
The aircraft concerned was equipped with Hums, and if that didn't pick up any problems in time for corrective action, there is no way that a BIM would have shown anything in time to prevent this accident.
I think that those who suggest that any blade which shows any evedence of a lightening strike are correct. Of course, we all know that now as a result of those lives lost. Blame the operator, yes, if you like, but that operator did send the blade back for an "authorised repair" by the manufacturer. Perhaps it is Sikorsky who should have scrapped it.
LE