...Crankshaft Type: 911-01 / Serial Number: D369741
These photos shows us the typical damage found after the flywheel works its way loose https://pbase.com/image/53495471. The issue of the loose flywheels normally only affect the 6-bolt crankshafts and not the 9-bolt counterparts. Take at look at the last 4 photos https://pbase.com/image/53495460 to see what can happen. Ouch!