What was found
A/C ENG CRANKCASE FAILURE AS A RESULT OF A RECENT FAILURE DESCRIBED IN SDR CA040806006 SUBMITTED 08/6/2004, A VOLUNTARY INSPECTION CARRIED OUT BY OPERATOR AT REQUEST OF OVERHAUL FACILITY. CYLINDERS NR 1 & 3 REMOVED SO THAT NR 2 & 3 INTERMEDIATE BEARING SADDLE COULD BE VIEWED. INSPECTION CONCLUDED THAT MOVEMENT OF BEARINGS HAD OCCURRED & TEAR DOWN OF ENG WOULD BE REQUIRED FOR FURTHER INVESTIGATION. UPON TEAR DOWN, FOUND FRETTING OF CRANKCASE ON NR 2 & NR 3 INTERMEDIATE MAIN BEARING THRU-BOLT PADS.