From the photographs of the engine at its crash site, IMO the engine was not turning at impact. Hardly surprising if it separated from the airframe whilst airborne. The propeller blades show no signs of rotational damage and it appears the engine landed back end first - the spinner looks unmarked.
Diaporama | Crash d'un avion de tourisme, un cabinet de kinés incendié : un week-end de faits divers | Paris Normandie