SF340 VH-EKT had torque motor issues immediately prior to this incident.
https://www.atsb.gov.au/publications...aair199201222/
Crew elected to land without going to torque motor lockout. Prop runaway ensued resulting in loss of control and snapping of nose gear on touchdown. Not saying todays incident is similar but the CT7, like any engine, is not infallible.
https://www.geaviation.com/commercia...nes/ct7-engine
It's been around a while and is pretty reliable.
Job well done by the crew. I'm sure Rex will give them a little bit of extra nothing in their pay check as a reward.