What was found
(AUS) BROKEN MAIN BEARING PIECES FOUND IN SUMP. AFTER ENGINE STRIP-DOWN, THE FOLLOWING DEFECTS WERE FOUND: 1. OVERSIZED PISTON AND CYLINDER ASSEMBLIES FITTED. 2. SEVERE BEARING SADDLE FRETTING CAUSING MAIN BEARING MIGRATION. 3. CRANKCASE SEVERELY CRACKED AT NR 2 AND NR 3 MAIN BEARING JOURNALS. 4. PISTON PINS WORN BEYOND LIMITS. 5. IT APPEARS DURING LAST OVERHAUL, THE MAIN BEARING SADDLES WERE COATED WITH A GASKET COMPOUND AND CIRCLE OF SILK THREAD LAID AROUND THE THROUGH BOLT HOLES. PERSONNEL/MAINTENANCE ERROR. UNAPPROVED PROCEDURE AND REPAIR. PART TC: 2,297.