As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. REMOVED THE REAR COVER AND THE DISTRIBUTOR BLOCK FROM MAGNETO. CARBON BRUSH WEAR ON THE SIDE OF DISTRIBUTOR BLOCK ASSEMBLY, SHAFT SENT TO MFG FOR INSPECTION. NEW DISTRIBUTOR BLOCK ASSEMBLY INSTALLED IN MAGNETO.