Elevator trim runaway
Although my comment is not directly related to this incident;
On the advice of people older and wiser than myself (including flight engineers), on all the aircraft I have flown or managed I put a collar on the elevator trim circuit breaker so it could be located and pulled quickly if required. This act is triggered by the number of aircraft trim runaways that have historically occurred and the number of business jets where this has caused the loss of the airframe.
Whilst the occurrences are not common they do happen.
Well done to the crew for recovering from what can be a difficult problem to handle.
MM