As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED INSP, ENGINE NR 1, NR 2 AND APU STARTER/GENERATORS, BRUSH INSPECTION SHOWED THE WIRES WERE BROKEN OFF SEVERAL BRUSH ASSEMBLIES. THE WEAR INDICATORS SHOWED APPROX. 50 PERCENT LIFE REMAINING. TBO AND LAST OVERHAUL AGENCY ARE UNKNOWN. THE RIVETS SECURING THE WIRES TO THE BRUSH APPEAR TO HAVE SHEARED. IT IS UNKNOWN IF THIS WAS A BAD RUN OF BRUSHES OR PARTS FROM THE LOWEST BIDDER.