As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU CONTROL APUC DETECTED FAILURE OF REDUNDANT CONTROL FUNCTION OR LOSS OF ONE ARINC 629 CHANNEL. STATUS MSG01- NOT ACTIVE ENGINE START HARD; ELECTRIC STARTER MOTOR HAS BRUSH WEAR. DB- APU CONTROLLER (APUC) MSG-4910760 INACTV ES HARD. REPLACED STARTER MOTOR.