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 THE MM. DURING INSPECTION FOUND THAT THE CARBON BRUSH WAS RUBBING AND CAUSING CARBON DUST. HAVE MFG LOOK AT REDUCING THE TOLERANCES BETWEEN THE DISTRIBUTOR BLOCK AND THE GEAR POST WHERE THEY FIT TOGETHER TO HELP PREVENT GEAR FROM ROCKING BACK AND FORTH.