Clarification, please, for a non-multi pilot.
Aerplane climbing normally, then; Uptrim (of #1) and autofeather (of #2) was commanded when there was nothing wrong with #2. Was that a pilot-initiated command or a spurious fault? Or don't we know? In other words, what event kicked off the autofeather of one good engine (#2) and the pilot's shutting down the other good engine (#1)?
Wasn't #2 power lever firewalled at one stage during the decent? If #2 was running, why didn't it unfeather, wind up, and save the day? Was it just that it was firewalled too late to do that?
No indication yet of why #2 feathered - except that it did so simultaneously with the flameout warning- but wasn't flamed out.
#2 was firewalled early on in the proceedings. It began to unfeather at exactly the point the power lever was retarded, sadly too late in the day to affect the outcome...