Originally Posted by
lomapaseo
Agree that more fuel than wanted means more temperature in the turbine and rapid wear-out. However, it also means more RPM and if it meters passed that emergency response line it may drive the rpms into very bad vibratory modes and fatigue of the disks in very short order.
Such possibilities will require full strip and replacement if confirmed via recorders. In this case with the plane crashed I doubt anybody is looking to reuse anything :0
On the PW engine the DEEC will normally try to maintain the RPM within limits despite the higher temperature, by closing the nozzle. The GE probably does the same, but the amount of fuel was probably so great that the RPM still went above 110%. The pictures show that all the blades on one of the turbine wheels have lost the outer one third. They look as if they have melted away.