As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO LOG BOOKS AVAILABLE AT TIME OF REPORT. NR 5 CYLINDER HEAD COMPLETELY SEPARATED FROM BARREL. SEPARATION OCCURRED IN ALUMINUM HEAD AT EXTREME TOP OF STEEL BARREL. NO DAMAGE OCCURRED IIN BARREL THREADED AREA. CYLINDER PREVIOUSLY CHROME PLATED AND IS MARKED 1-84 CP-81580--05, .020 INCH ON CASE END OF BARREL.