DOC AIRBUS | AMM A320FRemoval of the Permanent Magnet Generator (PMG) and Cooling Fan Assembly (APS 3200)
TASK 49-52-53-000-001-A
Removal of the Permanent Magnet Generator (PMG) and Cooling Fan Assembly (APS 3200)
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 49-52-53-860-052-A ** ON A/C NOT FOR ALL
Subtask 49-52-53-020-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:31:31 UTC
Removal of the Permanent Magnet Generator (PMG) and Cooling Fan Assembly (APS 3200)
WARNING:
DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | CAP - BLANKING |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 315 | TAIL CONE APU AND ACCESSORY COMPARTMENT |
| 316 | TAIL CONE APU AND ACCESSORY COMPARTMENT |
| 315AL, 316AR |
| 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 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 49-11-11-000-003-A | Removal of the Power Plant (APU) (APS 3200) |
| 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 |
Subtask 49-52-53-860-052-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) 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 49-52-53-865-050-A ** ON A/C NOT FOR ALL (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) 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).
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 49-52-53-010-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the APU access doors 315AL and 316AR.
(2) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control switch 11LJ to the on position.
4. Procedure(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the APU access doors 315AL and 316AR.
(2) Open the APU access doors 315AL 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the LIGHT control switch 11LJ to the on position.
Subtask 49-52-53-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the PMG and Cooling Fan Assembly
PMG and Cooling Fan without Compartment Cooling Valve Installed and with Cooling Duct Installed ** ON A/C NOT FOR ALL
PMG and Cooling Fan without Compartment Cooling Valve and Cooling Duct Installed ** ON A/C NOT FOR ALL
(a) Disconnect electrical connector P28 (8) from the cooling fan (12).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Disconnect the tube (11) from the cooling valve (3).
(d) Disconnect the clamp (4) from the cooling valve duct (5).
(e) Remove the two bolts (9) and remove the cooling valve (3).
(f) Disconnect the clamps (2) and (10) and remove the fan inlet duct (1).
(g) Disconnect the clamp (7) from the fan outlet duct (6).
(h) Disconnect the clamp (15) and remove the cooling fan (12).
(i) Remove and discard the packings (13) and (14).
(j) Put the PLUG-BLANKING in each disconnected line end.
(2) Remove the PMG and cooling fan assembly (compartment cooling valve not installed and the cooling valve duct installed - On APUs with the Mod 6 Dot deleted on the modification plate).
(a) Disconnect electrical connector P28 (8) from the cooling fan (12).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Disconnect the clamp (4) from the cooling valve duct (5).
(d) Remove the two bolts (19) and remove the cooling duct (18).
(e) Disconnect the clamps (2) and (10) and remove the fan inlet duct (1).
(f) Disconnect the clamp (7) from the fan outlet duct (6).
(g) Disconnect the clamp (15) and remove the cooling fan (12).
(h) Remove and discard the packings (13) and (14).
(i) Put the PLUG-BLANKING in each disconnected line end.
(3) Remove the PMG and cooling fan assembly (compartment cooling valve and cooling valve duct not installed).
(a) Disconnect electrical connector P28 (8) from the cooling fan (12).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Disconnect the clamps (2) and (10) and remove the fan inlet duct (1).
(d) Disconnect the clamp (7) from the fan outlet duct (6).
(e) Disconnect the clamp (15) and remove the cooling fan (12).
(f) Remove and discard the packings (13) and (14).
(g) Put the PLUG-BLANKING in each disconnected line end.
(4) Do a visual inspection of the fan gear for too much wear or missing teeth. If you find too much wear or if there are missing teeth, install the cooling fan (12) again and replace the APU [4005KM] (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
(5) Do a visual inspection of the gearbox gear that engages with the fan gear for too much wear or missing teeth. If you find too much wear or if there are missing teeth, install the cooling fan (12) again and replace the APU [4005KM] (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
(6) Do a check of the fan gear to make sure that it turns smoothly. If it is not possible to turn it or if it does not turn smoothly, install the cooling fan (12) again and replace the APU [4005KM] (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
PMG and Cooling Fan without Compartment Cooling Valve Installed and with Cooling Duct Installed ** ON A/C NOT FOR ALL PMG and Cooling Fan without Compartment Cooling Valve and Cooling Duct Installed ** ON A/C NOT FOR ALL CAUTION:
YOU MUST USE TWO WRENCHES AND HOLD THE COMPONENT WHEN YOU REMOVE/INSTALL THE PIPE COUPLINGS AND/OR UNIONS. THIS PREVENTS DAMAGE TO THE COMPONENT.
(1) Remove the PMG and cooling fan assembly (compartment cooling valve installed - On APUs with the Mod 6 Dot on the modification plate). (a) Disconnect electrical connector P28 (8) from the cooling fan (12).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Disconnect the tube (11) from the cooling valve (3).
(d) Disconnect the clamp (4) from the cooling valve duct (5).
(e) Remove the two bolts (9) and remove the cooling valve (3).
(f) Disconnect the clamps (2) and (10) and remove the fan inlet duct (1).
(g) Disconnect the clamp (7) from the fan outlet duct (6).
(h) Disconnect the clamp (15) and remove the cooling fan (12).
(i) Remove and discard the packings (13) and (14).
(j) Put the PLUG-BLANKING in each disconnected line end.
(2) Remove the PMG and cooling fan assembly (compartment cooling valve not installed and the cooling valve duct installed - On APUs with the Mod 6 Dot deleted on the modification plate).
(a) Disconnect electrical connector P28 (8) from the cooling fan (12).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Disconnect the clamp (4) from the cooling valve duct (5).
(d) Remove the two bolts (19) and remove the cooling duct (18).
(e) Disconnect the clamps (2) and (10) and remove the fan inlet duct (1).
(f) Disconnect the clamp (7) from the fan outlet duct (6).
(g) Disconnect the clamp (15) and remove the cooling fan (12).
(h) Remove and discard the packings (13) and (14).
(i) Put the PLUG-BLANKING in each disconnected line end.
(3) Remove the PMG and cooling fan assembly (compartment cooling valve and cooling valve duct not installed).
(a) Disconnect electrical connector P28 (8) from the cooling fan (12).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Disconnect the clamps (2) and (10) and remove the fan inlet duct (1).
(d) Disconnect the clamp (7) from the fan outlet duct (6).
(e) Disconnect the clamp (15) and remove the cooling fan (12).
(f) Remove and discard the packings (13) and (14).
(g) Put the PLUG-BLANKING in each disconnected line end.
(4) Do a visual inspection of the fan gear for too much wear or missing teeth. If you find too much wear or if there are missing teeth, install the cooling fan (12) again and replace the APU [4005KM] (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
(5) Do a visual inspection of the gearbox gear that engages with the fan gear for too much wear or missing teeth. If you find too much wear or if there are missing teeth, install the cooling fan (12) again and replace the APU [4005KM] (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).
(6) Do a check of the fan gear to make sure that it turns smoothly. If it is not possible to turn it or if it does not turn smoothly, install the cooling fan (12) again and replace the APU [4005KM] (Ref. AMM TASK 49-11-11-000-003) and (Ref. AMM TASK 49-11-11-400-003).