190 warrior:
A double flameout at cruise level could cause a pressurisation problem and justify a 6000fpm dive down to breathable air.
How well does the 190 glide one it gets down to decent air ?
How easy would a restart be, in some engines a flameout can result in temporary bearing siezure due to uneven cooling and it cannot be restarted until the temperatures in the engine equalise to free it up.
It would be interesting to know if the engines were actually turning when it crashed, this is an easy one for the investigation to determine.