I was told at that time the saving grace for the BA crew was that the engines were RR (triple spool) and if they had been US manufacturers then probably not restartable under any circumstances due to pumice damage.
Anyone else heard this?
Pumice is really nasty stuff, saw a military plane sand blasted to bare metal after a young pilot wanted to find out what it would be like to fly through a plume from one of NZ'zzzzz volcanoes.