As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) LT ENGINE STARTER MOTOR FAULTY. ONE NEGATIVE BRUSH MISSING WITH THE OTHER NEGATIVE BRUSH LOOSE IN THE BRUSH HOLDER AND EVIDENCE OF SEVERE ARCING AROUND THE BRUSH/PIGTAIL SECURING SCREW. BOTHPOSITIVE BRUSHES WERE LOOSE AND THE BRUSH HOLDERS WITHSEVERE ARCING AROUND THE SECURING SCREW.