What I think is important is that with a measurement device (and logging of measurement data) one can research the cumulative effects of flying longer times through low ash concentrations. This allows answers on some important questions:
- Is there an ash concentration below which there are no observable effects on jet engines?
- What is the relation between ash concentration, flight times and overhaul intervals to sustain safe flight?
We know thick ash clouds are bad for planes; but little is knows about the effects of light ash concentrations. Applause for EasyJet to invest money in this research.