It's still a great mystery to me where the VA evidence is going!
Under present (new) rules, it would be very unusual for an engine to run for as long as an hour in an ash zone or around the edges where it can be assumed there would have to be some ingestion. Nevertheless, if the permitted worst case is 10 (TEN) kilos per hour through the front of the engine, there would have to be some traces left, somewhere, from shorter encounters.
So where is it??
Or are people not yet looking in the right places?