As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION OF RT ALTERNATOR BRUSH NOTICED A SCREW MISSING FROM BRUSH HOLDER. UPON DISASSEMBLE OF BRUSH BLOCK ASSY. THE BRUSH ASSY HAD CUT A GROOVE INTO LOWER SLIP RING. THE SCREW WAS ALSO LOCATED UNDER THE BRUSH BLOCK ASSY IN TWO PIECES WORN THROUGH MIDDLE OF SCREW. PLATE THAT SEPARATED THE TWO HALVES ALSO BROKEN AND MISSING PARTS. REPLACED ALTERNATOR. (M)