As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INTERNAL MAGNETO INSPECTION, FOUND DISTRIBUTOR BLOCK SPOT FACED AREA FOR POLES. APPEARS TO BE INCORRECTLY SPOT FACED. MATERIAL THAT WAS LEFT BEHIND HAS THE SAME LOFT AS BEARING BOSS AREA ON DISTRIBUTOR BLOCK. THIS CAUSES THE FINGER ON THE DISTRIBUTOR GEAR TO RUB ON THE DISTRIBUTOR BLOCK. (K)