DOC AIRBUS | AMM A320FOperational Test of the APU Fuel-Pump System
TASK 28-22-00-710-002-A
Operational Test of the APU Fuel-Pump System
1. Reason for the Job
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 28-22-00-860-054-A
Subtask 28-22-00-710-051-A
Subtask 28-22-00-860-055-A
[Rev.10 from 2021]
2026.04.02 06:17:30 UTC
Operational Test of the APU Fuel-Pump System
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 | STEPLADDER 2.0 M (6.6 FT) |
| 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 31-60-00-860-001-A | EIS Start Procedure |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
Subtask 28-22-00-860-054-A
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) On the APU section of the overhead panel 25VU, make sure that the APU MASTER SW is in the off position (the ON legend is off).
(4) On the FUEL overhead panel 40VU, make sure that all L TK PUMPS and R TK PUMPS pushbutton switches are released (the OFF legends are on).
(5) On the FUEL overhead panel 40VU, make sure that the X FEED pushbutton switch is released (the ON legend is off).
Subtask 28-22-00-010-051-A (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) On the APU section of the overhead panel 25VU, make sure that the APU MASTER SW is in the off position (the ON legend is off).
(4) On the FUEL overhead panel 40VU, make sure that all L TK PUMPS and R TK PUMPS pushbutton switches are released (the OFF legends are on).
(5) On the FUEL overhead panel 40VU, make sure that the X FEED pushbutton switch is released (the ON legend is off).
B. Get Access
(1) Open the LH main landing-gear (MLG) door (Ref. AMM TASK 32-12-00-010-001).
(2) Put the STEPLADDER 2.0 M (6.6 FT) in position at the LH MLG door.
Subtask 28-22-00-865-052-A (1) Open the LH main landing-gear (MLG) door (Ref. AMM TASK 32-12-00-010-001).
(2) Put the STEPLADDER 2.0 M (6.6 FT) in position at the LH MLG door.
C. Make sure that this(these) circuit breaker(s) is(are) closed:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | FUEL/X FEED/VALVE/MOT1 | 2QE | A12 |
| 49VU | APU/FUEL/BLOW OFF/PUMP | 2QC | B14 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/FUEL/BLOW OFF/CTL | 1QC | K39 |
| ** ON A/C ALL | |||
| 121VU | APU/APU/CTL | 2KD | L42 |
| 121VU | APU/ECB/SPLY | 1KD | L41 |
| 121VU | APU/FUEL/LP VALVE/CTL | 1QF | M40 |
| 121VU | APU/FUEL/LP VALVE/SPLY | 2QF | M39 |
| 121VU | APU/FUEL/PUMP/CTL | 3QC | M38 |
| 121VU | FUEL/X FEED/VALVE/MOT2 | 1QE | M24 |
| 121VU | FUEL/L WING TK/PUMP2 SPLY | 7QA | N26 |
| 121VU | FUEL/L WING TK/PUMP1 SPLY | 1QA | N23 |
| 121VU | FUEL/R WING TK/PUMP2 SPLY | 8QA | Q26 |
| 121VU | FUEL/R WING TK/PUMP1 SPLY | 2QA | Q23 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | APU/FUEL/BLOW OFF/CTL | 1QC | P38 |
Subtask 28-22-00-710-051-A
A. Operational Test of the APU Fuel-Pump System
5. Close-upNOTE: You can feel with your hand when the APU fuel pump operates.
| ACTION | RESULT |
|---|---|
1.On the APU section of the overhead panel 25VU:
| On the APU section of the overhead panel 25VU:
|
| | At the APU Fuel Pump 4QC on the FR42/ZONE 140:
|
2.On the FUEL overhead panel 40VU:
| On the FUEL overhead panel 40VU:
|
| | At the APU Fuel Pump 4QC on the FR42/ZONE 140:
|
3.On the FUEL overhead panel 40VU:
| On the FUEL overhead panel 40VU:
|
| | At the APU Fuel Pump 4QC on the FR42/ZONE 140:
|
4.On the APU section of the overhead panel 25VU:
| On the APU section of the overhead panel 25VU:
|
| | At the APU Fuel Pump 4QC on the FR42/ZONE 140:
|
Subtask 28-22-00-860-055-A
A. Put the aircraft back to its initial configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Put the system back to the serviceable condition.
Subtask 28-22-00-410-053-A (1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Put the system back to the serviceable condition.
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the stepladder from the LH MLG door.
(3) Close the LH MLG door. (Ref. AMM TASK 32-12-00-410-001)
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the stepladder from the LH MLG door.
(3) Close the LH MLG door. (Ref. AMM TASK 32-12-00-410-001)