As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REMOVED MAGNETO DURING ANNUAL INSPECTION AND NOTICED SHAFT NUT WAS COMPLETELY STRIPPED AND HELD IN PLACE ONLY BY BROKEN COTTER PIN. REMOVED COTTER PIN AND NUT, FOUND SHAFT COMPLETELY STRIPPED AND BUSHING VERY LOOSE AND SLOPPY ON SHAFT. REMOVED BUSHING AND FOUND SHAFT UNDER BUSHING WORN APPROXIMATELY HALF-WAY THROUGH AND WOODRUFF KEY SEVERELY DEFORMED. DRIVE PLATE AND SHAFT AREA UNDER DRIVE PLATE APPEAR NORMAL.