General Visual Inspection of the APU Seals (APS3200)

TASK 49-13-00-200-803-A
General Visual Inspection of the APU Seals (APS3200)

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	ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 49-13-00-200-002-A	General Visual Inspection of all APU Compartment Fire Walls and Seals (Compartment Doors, Fwd and Aft Walls, Side Fire Walls, Upper Fire Wall)
TASK 49-16-00-210-002-A	Detailed Inspection of APU Air Intake, Diffuser Elbow, Seals and Felt Metal (APS 3200)
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
APU Seals (APS3200)

3. Job Set-up
Subtask 49-13-00-860-058-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the APU MASTER SW p/bsw on the panel 25VU is set to the OFF position.
(3) Put a WARNING NOTICE(S) in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001)

Subtask 49-13-00-865-058-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
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41

Subtask 49-13-00-010-054-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is in position below the APU access doors 315AL and 316AR.
(2) Make sure that the APU access doors 315AL and 316AR are open, safety them in the open position (Ref. AMM TASK 52-41-00-010-001).
(3) Set the light switch 11LJ to the ON position.

4. Procedure
Subtask 49-13-00-210-056-A ** ON A/C NOT FOR ALL

A. General Visual Inspection of the APU seals
(1) Do a check of the APU access doors rubber seal condition and an inspection of the APU compartment door seals (Ref. AMM TASK 49-13-00-200-002).
(a) Make sure that the flexible seals on the air intake system are clean and in correct condition and position (Ref. AMM TASK 49-16-00-210-002).
(b) Make sure that the oil cooler discharge duct aligns with the left APU access door correctly.

APU Seals (APS3200) ** ON A/C NOT FOR ALL

5. Close-up
Subtask 49-13-00-410-054-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 switch 11LJ to the OFF position.
(3) Close the APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Remove the access platform(s).

Subtask 49-13-00-865-059-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
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41

Subtask 49-13-00-860-059-A ** ON A/C NOT FOR ALL

C. Put the aircraft back to its initial configuration.
(1) De-energize the ground service network
(Ref. AMM TASK 24-41-00-862-002).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:41:50 UTC