John Hall wrote:

In article ,
Neil writes:
Why then is it so important that aircraft avoid what seems to be a
little bit of fine dust?

I understand that the plane can suffer engine failures etc if it
goes through dense cloud of volcanic ash but is that likely to
happen at such limited concentrations?

I think that past experience when aircraft have encountered such
clouds elsewhere in the world indicates that the answer is yes. A jet
engine must have an awful lot of air going through it, so it wouldn't
need to be very concentrated dust for it to start clogging things up
after a bit. I would imagine that any old piston-engined aircraft
would be pretty much unaffected.

Execpt that the air filters would quickly get clogged

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zaax
Frustration casues accidents: allow faster traffic to overtake.