What was found
DURING A ROUTINE TIRE CHANGE, A MAIN WHEEL INBD BEARING OUTER RACE WAS FOUND SPINNING IN THE WHEEL HALF RESULTING IN EXCESSIVE WEAR TO THE WHEEL BEARING BORE. FURTHER INSPECTION REVEALED CRACKS IN THE WHEEL HALF AT THE BEARING BORE. THE REMOVED WHEEL BEARINGS ARE SERVICEABLE. THE WHEEL BEARINGS WERE LAST INSPECTED/LUBRICATED JANUARY 22, 2016 AT ACTT: 9403.3 HOURS, 77.2 HOUR BEFORE DISASSEMBLY. THIS WHEEL WAS INSTALLED NEW ON THIS ACFT DEC. 24, 2014 AT ACTT: 9084.0 HOURS. CAUSE OF THE PREMATURE WHEEL FAILURE IS UNKNOWN. THE WHEEL HAS BEEN SENT TO THE MFG FOR EVALUATION. THIS WHEEL/BRAKE INSTALLATION IAW STC SA497GL.