What was found
BEARING REMOVED FROM AN ENGINE DURING REPAIR WITH A TOTAL BEARING TIME OF 1,449.4 HOURS WITH NO PREVIOUS OVERHAULS. NO OTHER BEARING IN THE ENGINE WAS DISCREPANT. DURING OVERHAUL, THE BEARING WAS INSPECTED AND ONE UNUSUAL CONDITION WAS FOUND: THE BALLS EXHIBITED SEVERE SCRATCHES. THIS IS THE SECOND BEARING EXHIBITING A MANUFACTURING DEFECT WHICH CAUSES SURFACE DAMAGE TO THE BEARING BALLS. A PREVIOUS MDR WAS SUBMITTED ON 9-30-97 ON THE SAME PART NUMBER. THE PREVIOUS BEARING WAS ANALYZED AND A MANUFACTURING DEFECT WAS CONFIRMED.