Inspection/ Check of the Starter Motor (131-9(A))

TASK 49-42-51-200-007-A
Inspection/ Check of the Starter Motor (131-9(A))

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

FIN: 8KA ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-42-51-000-006-A	Removal of the Starter Motor (131-9(A))
TASK 49-42-51-400-006-A	Installation of the Starter Motor (131-9(A))
TASK 49-42-52-000-003-A	Removal of the Starter Motor Clutch (131-9(A))
TASK 49-42-52-400-003-A	Installation of Starter Motor Clutch (131-9(A))
TASK 52-41-00-010-001-A	Open the APU Doors for Access
TASK 52-41-00-410-001-A	Close the APU Doors after Access

3. Job Set-up
Subtask 49-42-51-860-069-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) On the panel 25VU, make sure that the APU MASTER SW p/bsw is OFF.
(3) Put a warning notice in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).

Subtask 49-42-51-865-071-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-42-51-010-066-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the access platform in position below the APU access doors 315AL and 316AR.
(2) Open the APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control SW 11LJ to the ON position.

4. Procedure
Subtask 49-42-51-210-062-A ** ON A/C NOT FOR ALL

A. Inspection of the brush indicator of the Starter Motor
(1) If necessary, clean the brush-wear indicator area with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(2) Do a visual check of the brush-wear indicator pin position
(a) If you cannot see the brush-wear indicator pin:

Replace the starter motor (Ref. AMM TASK 49-42-51-000-006) and (Ref. AMM TASK 49-42-51-400-006)

(b) If you can see the brush-wear indicator pin, but there are signs of oil contamination in the indicator:

Replace the starter motor (Ref. AMM TASK 49-42-51-000-006) and (Ref. AMM TASK 49-42-51-400-006)

Subtask 49-42-51-210-059-A ** ON A/C NOT FOR ALL

B. Inspection of the Starter Motor and Clutch Assembly.
(1) Remove the starter motor (Ref. AMM TASK 49-42-51-000-006).
(2) Do a visual check of the starter motor. Make sure that the external condition of the starter motor is correct.
(3) Do a visual check of the starter motor clutch assembly. Make sure that the internal splines are satisfactory. Replace the clutch assembly if the internal splines have a crack, are broken or missing (Ref. AMM TASK 49-42-52-000-003) (Ref. AMM TASK 49-42-52-400-003).
(4) Do a visual check of the starter motor drive shaft. Make sure that the external splines are satisfactory. Replace the starter motor if the splines are cracked, broken or missing .
(5) Do a visual check of the starter motor/accessory drive gearbox mating faces.
(6) Install the starter motor (Ref. AMM TASK 49-42-51-400-006).

5. Close-up
Subtask 49-42-51-410-063-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Set the LIGHT control SW 11LJ to the OFF position.
(3) Close the APU access doors 316AR 315AL (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).

Subtask 49-42-51-865-072-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-42-51-860-070-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Put the related hydraulic system in the pressurized configuration (Ref. AMM TASK 29-00-00-864-001).
(2) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 01:30:27 UTC