Removal of the APU Substitution Kit (APS 3200)

TASK 49-11-00-000-003-A
Removal of the APU Substitution Kit (APS 3200)

1. Reason for the Job
Removal of the APU Substitution Kit
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	COVER - PROTECTION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	THREAD PROTECTION

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 24-42-00-862-001-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 49-11-11-400-003-A	Installation of the Power Plant (APU) (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
TASK 52-41-18-000-001-A	Removal of the APU Exhaust Access-Fairing
TASK 52-41-18-400-001-A	Installation of the APU Exhaust Access-Fairing
Suspension and electrical Connections
Fuel Feed, Exhaust Muffler, Bleed Air Duct and Oil Cooler Outlet

3. Job Set-up
Subtask 49-11-00-860-061-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the panel 25VU make sure that the APU MASTER SW pushbutton switch is off.
(3) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
(4) Put a warning notice in the cockpit to tell persons not to start the APU.

Subtask 49-11-00-010-057-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below APU access doors 315AL and 316AR.
(2) Open APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Remove the APU exhaust access-fairing (Ref. AMM TASK 52-41-18-000-001).
(4) Set LIGHT control switch 11LJ to the ON position.

Subtask 49-11-00-865-059-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	APU/FIRE AND OVHT/DET/LOOP B	2WG	L44
121VU	APU/FIRE AND OVHT/DET/LOOP A	1WG	L43
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38

4. Procedure
Subtask 49-11-00-020-054-A ** ON A/C NOT FOR ALL

A. Removal of the APU Substitution Kit
(1) Remove the oil-cooler outlet-duct plug (31) on the door 315AL.
(2) Remove the bleed-air duct plug (35) from the bleed air duct (24).
(3) Install the COVER - PROTECTION to the bleed air duct (24).
(4) Remove the blanking plug (27) from the exhaust muffler drain (30).
(5) Remove the exhaust muffler plug (32) from the APU exhaust outlet (33).
(6) Remove the blanking plugs (38) on the APU access door 316AR drain interfaces.
(7) Support the rear suspension assembly (18) and remove the nut (17), the washers (16) and the bolt (14).
(8) Continue to support the rear suspension assembly (18) and remove the nut (13). Install the THREAD PROTECTION and remove the assembly (18).
(9) Remove the generator cables (7) from the cross member assembly (3) and attach temporarily to the bulkhead.
(10) Remove the starter cables (20) from the cross member assembly (3) and attach temporarily to the bulkhead.
(11) Support the cross member assembly (3) and remove the nuts (1) the washers (2) and fit the thread protectors.
(12) Remove the blanking plug (28) from the APU fuel feed pipe (29).
(13) Remove the blanking caps (19) from the connector sockets 7120VC, 7138VC and 7118VC.
(14) Remove the cross member assembly (3).

Subtask 49-11-00-420-053-A ** ON A/C NOT FOR ALL

B. Install the APU. (Ref. AMM TASK 49-11-11-400-003)

5. Close-up
Subtask 49-11-00-410-057-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 LIGHT control switch 11LJ to the OFF position.
(3) Close APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-410-001).
(4) Install the APU exhaust access-fairing (Ref. AMM TASK 52-41-18-400-001).
(5) Remove the access platform(s).

Subtask 49-11-00-860-051-A ** ON A/C NOT FOR ALL

B. 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 01:26:38 UTC