What was found
PILOT REPORTED A CHIP LIGHT AFTER TAKEOFF. AS ACFT WAS TURNING A BASE LEG FOR LANDING AT EC278B. A LOUD WHINING NOISE WAS HEARD FOLLOWED BY A LOUD POPPING NOISE AND A YAW. COMPLETED A SUCCESSFUL WATER LANDING. TEARDOWN INSPECTION REVEALED 25 PERCENT OF NR 2 BEARING OUTER RACE BROKEN INTO PIECES WITH 1 BALL EXITING THE SEPERATOR, METAL TRANSFERRANCE AND HEAT DISCOLORATION ON BALLS AND INNER RACES. 25 PERCENT OF REAR SUPPORT BEARING BORE BROKEN OFF FROM FORWARD BEARING FLANGE REARWARD WITH A CRACK AND GOUGING AT THE FLANGE. PARTS RETURNED TO MFG FOR FAILURE INVESTIGATION.