There way a case in New Zealand back in the 60/70 of an ag pilot (crop duster) who had taken his C180 in for a AD prop check, all ok but on the flight but to his home base the prop let go and took the engine with it. Back and forth like a leaf he went until he landed, I have seen a photo of the 180 undamaged apart from nothing fire wall forward sitting in a paddock.I think the pilots name was Don Ecreg. As the story goes he walked to a farm house and phoned his engineer,
MY ENGINE IS MISSING (Q) HAVE YOU CHECKED THE PLUGS
(R) I WILL WENT I FIND THE ********** ENGINE. true story