As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ENGINE WAS REMOVED FROM THE AIRCRAFT COMPLETELY DISASSEMBLED FOR OVERHAUL. THE NR 3 CYLINDER INTAKE TAPPET WAS FOUND BROKEN AT THE CAM LOBE IN 3 PIECES. THE NR 4 PISTON SKIRT HAD A LARGE PIECE BROKEN FROM THE BOTTOM OF THE SKIRT. ALL PIECES WERE FOUND IN THE SUMP. ALL OTHER INTERNAL CONDITIONS WERE NORMAL. TOTAL ENGINE TIME SINCE RE-MFG: 2,135 HRS.