As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SB 97-78-01 C/W AT 59.2 HOURS AND NUT WAS TORQUE CHECKED. NUT AND 'STAR' TYPE LOCK WASHER FAILED TO HOLD WHEN GASKET BLEW. SUBMITTER RECOMMENDED UPGRADED GASKETS HAVE MANDATORY INSTALLATION (SB 97-78-01) AND SELF-LOCKING NUTS USED INSTEAD OF STAR-TYPE LOCK WASHERS.