As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE NR 2 CYLINDER ROCKER COVER HOLD-DOWN BOLTS BROKE, SENDING INTAKE BOLT UPPER BROKEN HALF THROUGH THE ROCKER COVER. THE CYLINDER WAS REMOVED AND SENT FOR REPAIR. NO OTHER DAMAGE WAS FOUND TO THE CYLINDER OR THE PISTON. ALL OTHER HOLD-DOWN BOLTS WERE CHECKED.