Procedures if Mt St Helens blows
Was anyone around last time Mt St Helens went up ? What sort of exclusion zone was set round it, and for how long ? Is one in place at the moment ? Any special procedures needed for dealing with the ash ?
I recall it gave all sorts of troubles with ground equipment as well last time for weeks afterwards, any air conditioner or engine needed filters changing daily. I think the two well known incidents of ash causing complete in-flight shutdowns, the BA one over Indonesia and the one over Alaska have happened since then so presume some things have been learned.