Of seven propstrike teardowns, we've found two cracked cranks
and another bent. Bent cranks don't run properly in the bearings,
wearing them rapidly and ultimately resulting in failure. The undamaged
cranks were from more minor propstrikes.
Here's another reason to get it checked: An engine overhaul
shop had a crank with a crack through the front main, caused by a
propstrike. They tossed it into the scrap barrel, where it was spotted
by a guy building up an engine for his homebuilt. He wanted it, they
refused, and it disappeared shortly thereafter. A couple of years later
they heard of this same guy being killed in his homebuilt when the
front of the crank broke off and the prop came through the windshield,
believe it or not, killing him instantly. Investigators found that the
crack in the crank had been welded and remachined.

Dan

Dan