What was found
APU CONTROL APUC DETECTED FAILURE OF REDUNDANT CONTROL FUNCTION OR LOSS OF ONE ARINC 629 CHANNEL. STATUS MSG01- ACTIVE TAXI IN HARD; ELECTRIC STARTER MOTOR HAS BRUSH WEAR. DB- APU CONTROLLER (APUC) MSG02- ACTIVE TAXI IN HARD; ELECTRIC STARTER MOTOR HAS BRUSH WEAR. MSG-4910760 ACTIVE TI HARD MSG-4910760 ACTIVE TI HARD. STARTER DRIVE (GEARBOX SIDE ) CLUTCH AND ADAPTER DAMAGED. STARTER DAMAGED ALSO. REPLACED APU ELECT STARTER & CLUTCH ASSY. REPLACED APUC, NO HELP. REPLACED APU STARTER (SERIAL NUMBER 34) OPS CHECKS GOOD.