As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A 500 HOUR INSP, COMPLIANCE OF M/N 6314 MAGNETOS, LT MAGNETO SHOWED SIGNS OF EXTREAM HIGH HEAT INTERNALLY. SB SB3-08A ADDRESSES PROBLEM CAUSED BY "SOFT" CARBON BRUSHES PACKAGED FROM SEPT 1, 2004 THROUGH AUGUST 14, 2008. TT OF MAGNETO WAS DOCUMENTED AS 1672.8. MAGNETO CASE SCREW HAD FACTORY APPLIED TORQUE SEAL IN PLACE. BREAKER POINT ASSY HAD PLASTIC MATERIAL MELTED AROUND IT. FURTHER DISASSEMBLY REVEALED SOURCE OF MELTED PLASTIC AS MATERIAL FROM THE DISTRIBUTER BLOCK & GEAR ASSY. CARBON BRUSH WAS SEVERLY WORN AS DESCRIBED AND ILLUSTRATED IN SB3-08A, PAGE 2.