As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PISTON PIN BROKE IN 2 PIECES CAUSING A CATASTROPHIC ENGINE FAILURE. OCTOBER 8, 1996, LYCOMING ISSUED A MANDATORY SB NR 527B PERTAINING TO THIS SUBJECT. THE PISTON PIN THAT FAILED HAD THE SAME CODE MARKED ON IT (17328) THAT THE SERVICE BULLETIN STATED MUST BE REPLACED. SUBMITTER RECOMMENDS SB 527B BE REPLACED WITH AN AD. MAINTENANCE RECORD REPORT NR 96-011-8520.