On Jun 8, 4:45*am, Mxsmanic wrote:

Assuming that aircraft flying over the ocean will
always be able to glide to land after an ash encounter is irresponsible.

Airplanes never fall out of the skies short of catostraphic
damage...

Even over the Atlantic, they can glide. Mighty expensive glider, but
they can glide and it may be a splashdown but they can land.