The file is closed. The engine and the electronic fuel control was inspected by P&W Canada. The reason for the failure couldn't be exactly detected, but is out of the question a technical problem. On the test rig the engine worked proper.
The pilot is fully rehabilitated and verified for "doing his best in an extrem difficult situation". Investigations showed some missed parts in flight manual and emergency checklist, pre-flight and transaction. As example, a nonexisting radio connection between pilot in the helicopter and rescuer on the sling.
After the accident the IKAR (International Commission for Alpine Rescue) published some safety advices to his members around the world and made some testflights to determine the chances for a HHEC autorotation.