What was found
(CAN) NR 1 PROPELLER ASSY REMOVED FOR UNSCHEDULED MAINTENANCE. IT WAS DISCOVERED THAT ONE BALL BEARING WAS SPLIT IN HALF IN THE BALL RETAINER ASSY. DAMAGED BALL WAS LOCATED IN THE MIDDLE OF THE RETAINER. THE SPLIT BALL BEARING DAMAGED ADJACENT BEARING RACE, ON PROPELLER BLADE, CAUSING A SIGNIFICANT GOUGE AND CRACKING. NR 1 BLADE ASS REPLACED AND ALL BALL BEARINGS REPLACED. BEARING RACE IN HUB ASSY REPLACED. ALL BLADES REMOVED AND PROPELLER ASSEMBLY DISASSEMBLED, INSPECTED AND MADE SERVICEABLE. NO OTHER DEFECTS NOTED.