As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISASSEMBLED RT MAGNETO. FOUND EXCESSIVE CARBON RESIDUE IN COIL AREA. FURTHER INVESTIGATION REVEALED THE ROTOR ARM ON GEAR ASSY HAD BECOME LOOSE ALLOWING APPROXIMATELY 30 DEGREE MOVEMENT SIDE TO SIDE. SUBMITTER RECOMMENDS 500-HOUR INSPECTION OF BLOCK AND GEAR ASSY IN FAA SAFETY RECOMMENDATION.