The next Thing everybody i know, does in an OEI Scenario is: Rudder Trim full on!!
But this scenario was not OEI. Maybe the pilot thought it was, but the wreckage examination found that both props were turning at 2000 RPM (approx), and both engines were delivering full power (approx).
He stated that there is a possible fcu drive shaft fault that results in a runaway engine and believes this is what happened. Looking at the amount of damage on the wreckage, how could this not be discounted from what happened?
Examination of both engines and both props showed that all were operating normally. For both engines, the prop shaft failed in the same place with an "almost identical" fracture surface. This could not have been the case if both engines were not at the same power and RPM.