As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOW VOLTAGE LIGHT COMES ON OCCASIONALLY-RESET SWITCH AND OPERATES NORMAL. FOUND BRUSHES WORN OUT IN ALTERNATOR. REMOVING ALTERNATOR WAS EXTREMELY DIFFICULT. MOUNTING BOLT WAS FROZEN IN ALTERNATOR. USING PENETRANT HELPED TO FREE THE BOLT. DISCOVERED THAT FACILITY HAD INSTALLED A STEEL BUSHING IN MOUNTING BOSS DURING OVERHAUL. THE BOLT AND BUSHING WERE RUSTED TOGETHER. THE BUSHING APPEARS TO BE A REPAIR.