As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 CYLINDER BASE DEVELOPED OIL LEAK AND ENGINE WAS SHUT DOWN. ONE CYLINDER BASE STUD WAS BROKEN AND 5 OTHERS, THE NUTS BACKED OFF DUE TOTHE STUDS LOOSENING IN THE CASE. THE STUDES WOULD NOT TIGHTEN INTO CASE DUE TO WHAT SEEMS SOFT CRANKCASE MATERIAL.