There is an “engine shock load” protocol. However, as the engine had already stopped running it is most likely not required in this case. So, as Prop Strike said (and with a name like that they, should know!!). Fitting a ready-to-go engine would save time – if the engine had to be removed for checks. 

The engine frame and bulkhead, I would suggest, would need inspection – as I said in a previous thread on this incident. Engine removal for access to carry out the two checks seems to me to be a requirement. In other words the engine would have to come out anyway. But refitting the original engine, in this case, is a matter of choice I would suggest.

H