As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAG INOPERATIVE. FOUND DISTRIBUTOR SHAFT BLUE. OPENED MAG AND FOUND DISTRIBUTOR BRUSH LOOSE IN MAG CASE. FOUND DISTRIBUTOR GEAR HUB AND COIL FINGER DAMAGED BY ARCING. BRUSH EITHER FELL OUT OR WAS INSTALLED IMPROPERLY. MAG RAN SEVERAL HOURS USING BRUSH SPRING TO COMPLETE CIRCUIT.