that if we do NOT get our ducks in a row over this question
BOAC
That will be the next one DUCK FLU
Sorry couldnt resist
More serious note yes I agree that proper research needs to be done to get realistic levels on different ash types maybe even not just ash damage but other pollutants.
From that research new training procedures for pilots in identifying ash and handling the aircraft in ash polluted air.
Because the reality is none of us really know and even the new levels have been plucked out of the air.
Now off with my handbag
Pace