W DOC AIRBUS | AMM A320F

Removal of the APU Substitution Kit (131-9(A))

TASK 49-11-00-000-005-A
Removal of the APU Substitution Kit (131-9(A))

1. Reason for the Job
Self explanatory
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
No specific
Torque wrench: range to between 5.31 and 4.85 m.daN (39.16 and 35.77 lbf.ft ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
315AL, 316AR
 C. 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 49-11-11-400-004-A
Installation of the Power Plant (APU) (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
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
F Suspension and Electrical Connections
F Fuel Feed, Exhaust Muffler, Bleed Air Duct and Oil Cooler Outlet
3. Job Set-up
Subtask 49-11-00-860-067-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 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 49-11-00-865-077-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUAPU/FIRE AND OVHT/DET/LOOP B2WGL44
121VUAPU/FIRE AND OVHT/DET/LOOP A1WGL43
121VUAPU/FIRE/EXTIG/SQUIB/B2WFL39
121VUAPU/FIRE/EXTIG/SQUIB/A1WFL38
Subtask 49-11-00-010-061-A ** ON A/C NOT FOR ALL
C. Get Access
   (1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the 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.
4. Procedure
Subtask 49-11-00-020-060-A ** ON A/C NOT FOR ALL
A. Removal of the APU Substitution Kit
F Suspension and Electrical Connections ** ON A/C NOT FOR ALL
F Fuel Feed, Exhaust Muffler, Bleed Air Duct and Oil Cooler Outlet ** ON A/C NOT FOR ALL
   (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 them temporarily to the bulkhead.
   (10) Remove the starter cables (20) from the cross member assembly (3) and attach them 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) Connect the vent and drain valve tee (39) to the APU fuel feed pipe (29).
   (14) TORQUE the nut of the fuel feed pipe (29) to between 5.31 and 4.85 m.daN (39.16 and 35.77 lbf.ft ) T.
   (15) Remove the blanking caps (19) from the connector sockets 7120VC, 7138VC and 7118VC.
   (16) Remove the cross member assembly (3).
Subtask 49-11-00-420-059-A ** ON A/C NOT FOR ALL
B. Install the APU. (Ref. AMM TASK 49-11-11-400-004)
5. Close-up
Subtask 49-11-00-410-062-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 49-11-00-865-078-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUAPU/FIRE AND OVHT/DET/LOOP B2WGL44
121VUAPU/FIRE AND OVHT/DET/LOOP A1WGL43
121VUAPU/FIRE/EXTIG/SQUIB/B2WFL39
121VUAPU/FIRE/EXTIG/SQUIB/A1WFL38
Subtask 49-11-00-860-068-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 12:42:04 UTC
"Aviabrain" 2025