Out of interest - since we've done the effect or no effect on the engines / airframe bit to death, what will the effects be on the SLF of flying for a few hours through the ash? Surely it'll make its way into the cabin via the CAU's & bleed air etc, not only being breathed in but also ingested in food & drink
That's a very valid question, I would suspect that once we start flying, the air quality will be monitored on a selection of aircraft. In the end a calculated risck will be taken, just as with the radiation you suffer once you reach cruising levels.