DOC AIRBUS | AMM A320FInstallation of the Fuel-Pump Check Valve
TASK 28-21-43-400-001-A
Installation of the Fuel-Pump Check Valve
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 28-21-43-941-052-A ** ON A/C NOT FOR ALL
Subtask 28-21-43-420-052-A ** ON A/C NOT FOR ALL
Subtask 28-21-43-860-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:17:25 UTC
Installation of the Fuel-Pump Check Valve
WARNING:
MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 540
ZONE: 640
FIN: 33QM ** ON A/C NOT FOR ALL
FIN: 34QM ** ON A/C NOT FOR ALL
FIN: 35QM ** ON A/C NOT FOR ALL
FIN: 36QM ** ON A/C NOT FOR ALL
1. Reason for the JobZONE: 640
FIN: 33QM ** ON A/C NOT FOR ALL
FIN: 34QM ** ON A/C NOT FOR ALL
FIN: 35QM ** ON A/C NOT FOR ALL
FIN: 36QM ** ON A/C NOT FOR ALL
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | Torque wrench: range to between 37 and 30 m.N (27.29 and 22.12 lbf.ft )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.01ABA1) | Turbine Fuel-- Kerosene - |
| (Material No.03FAB1) | Mineral Oil base Grease-- Vaseline or Petrolatum - |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 540 | FUEL TANK |
| 640 | FUEL TANK |
| 540AB, 640AB | |
| FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR) | |
| FOR [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR) | |
| 540AB, 540BZ | |
| FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR) | |
| FOR [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR) | |
| 640AB, 640BZ | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 1 | O-RING | AIPC 28-21-05-41-190 |
| 1 | O-RING | AIPC 28-21-85-32-180 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-11-28-650-003-A | Pressure Refuel with Automatic Control |
| TASK 28-10-00-910-001-A | Safety Procedures When You Do Work in a Fuel Tank |
| TASK 28-10-00-910-002-A | Access to the Fuel Tanks and the Work Areas |
| TASK 28-21-00-710-002-A | Operational Check of Wing Tank Pump Pressure Sense Line Check Valves |
| TASK 28-25-00-650-001-A | Pressure Defuel |
| TASK 28-25-00-650-003-A | To Drain Remaining Fuel from the Wing Tanks and the Center Tank |
| TASK 28-25-00-650-003-A-01 | To Drain Remaining Fuel from the Wing Tanks and the Center Tank |
| TASK 28-25-00-869-001-A | Fuel Transfer |
| TASK 57-27-11-000-001-A | Removal of the Access Panel |
| TASK 57-27-11-400-001-A | Installation of the Access Panel |
| FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR) | |
| FOR [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR) | |
| TASK 28-10-00-910-002-A | Access to the Fuel Tanks and the Work Areas |
| TASK 57-27-11-000-001-A | Removal of the Access Panel |
| TASK 57-27-11-400-001-A | Installation of the Access Panel |
| TASK 57-27-12-000-002-A | Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ) |
| TASK 57-27-12-400-002-A | Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ) |
| FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR) | |
| FOR [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR) | |
| TASK 28-10-00-910-002-A | Access to the Fuel Tanks and the Work Areas |
| TASK 57-27-11-000-001-A | Removal of the Access Panel |
| TASK 57-27-11-400-001-A | Installation of the Access Panel |
| TASK 57-27-12-000-002-A | Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ) |
| TASK 57-27-12-400-002-A | Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ) |
Fuel-Pump Check-Valve 33QM(36QM), 34QM(35QM)Subtask 28-21-43-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(2) Make sure that the SAFETY BARRIER(S) are in position.
Subtask 28-21-43-860-050-A ** ON A/C NOT FOR ALL WARNING:
BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.
(1) You must obey the fuel safety procedures (Ref. AMM TASK 28-10-00-910-001) when you do work in a fuel tank. (2) Make sure that the SAFETY BARRIER(S) are in position.
B. Aircraft Maintenance Configuration
(1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is below the applicable access panel 540AB(640AB).
(4) Make sure that the applicable wing access panel is removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001):
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
540AB
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
640AB
(5) Make sure that the applicable RIB2 surge door is open:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
open 540BZ
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
open 640BZ
(6) Make sure that the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) is on the applicable RIB2 surge door.
Subtask 28-21-43-860-050-G ** ON A/C NOT FOR ALL (1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is below the applicable access panel 540AB(640AB).
(4) Make sure that the applicable wing access panel is removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001):
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
540AB
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
640AB
(5) Make sure that the applicable RIB2 surge door is open:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
open 540BZ
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
open 640BZ
(6) Make sure that the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) is on the applicable RIB2 surge door.
B. Aircraft Maintenance Configuration
(1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the applicable access panels 540AB ( 640AB).
(4) Make sure that the applicable access panels are removed that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Remove 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Remove 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(5) Make sure that the applicable RIB2 access panels are removed that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Remove 540BZ (Ref. AMM TASK 57-27-12-000-002).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Remove 640BZ (Ref. AMM TASK 57-27-12-000-002).
Subtask 28-21-43-865-055-A ** ON A/C NOT FOR ALL (1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the applicable access panels 540AB ( 640AB).
(4) Make sure that the applicable access panels are removed that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Remove 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Remove 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(5) Make sure that the applicable RIB2 access panels are removed that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Remove 540BZ (Ref. AMM TASK 57-27-12-000-002).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Remove 640BZ (Ref. AMM TASK 57-27-12-000-002).
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 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 |
| 123VU | L WING TK/PUMP 1/STBY SPLY | 11QA | AD12 |
| 123VU | R WING TK/PUMP 1/STBY SPLY | 12QA | AE12 |
Subtask 28-21-43-420-052-A ** ON A/C NOT FOR ALL
A. Preparation for Installation
(1) Clean the component interfaces and the adjacent areas with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Make sure that the check valve (2) opens and closes correctly.
(5) Lubricate the new AIPC 28-21-05-41-190 O-RING (1) or AIPC 28-21-85-32-180 O-RING (1) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .
Subtask 28-21-43-420-050-A ** ON A/C NOT FOR ALL (1) Clean the component interfaces and the adjacent areas with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Make sure that the check valve (2) opens and closes correctly.
(5) Lubricate the new AIPC 28-21-05-41-190 O-RING (1) or AIPC 28-21-85-32-180 O-RING (1) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .
B. Installation of the Fuel-Pump Check-Valve 33QM (36QM), 34QM (35QM)
(1) Remove the blanking plugs from the disconnected line ends.
(2) Install the O-ring (1) on the check valve (2).
(3) Install the check valve (2) to the manifold.
(4) Connect the pipe (3) at the check valve (2).
(5) TORQUE the nut of the pipe (3) to between 37 and 30 m.N (27.29 and 22.12 lbf.ft ).
Subtask 28-21-43-410-050-A ** ON A/C NOT FOR ALL (1) Remove the blanking plugs from the disconnected line ends.
(2) Install the O-ring (1) on the check valve (2).
(3) Install the check valve (2) to the manifold.
(4) Connect the pipe (3) at the check valve (2).
(5) TORQUE the nut of the pipe (3) to between 37 and 30 m.N (27.29 and 22.12 lbf.ft )
.C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) from the applicable RIB2 surge door.
(3) Close the rib 2 rear access door:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
close 540BZ.
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
close 640BZ.
(4) Install the wing access panel (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-400-001):
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
install 540AB.
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
install 640AB.
Subtask 28-21-43-410-050-G ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) from the applicable RIB2 surge door.
(3) Close the rib 2 rear access door:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
close 540BZ.
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
close 640BZ.
(4) Install the wing access panel (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-400-001):
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
install 540AB.
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
install 640AB.
C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable RIB2 access panels that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Install 540BZ (Ref. AMM TASK 57-27-12-400-002).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Install 640BZ (Ref. AMM TASK 57-27-12-400-002).
(3) Install the applicable access panels that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Install 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-400-001).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Install 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-400-001).
Subtask 28-21-43-865-051-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable RIB2 access panels that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Install 540BZ (Ref. AMM TASK 57-27-12-400-002).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Install 640BZ (Ref. AMM TASK 57-27-12-400-002).
(3) Install the applicable access panels that follow:
(a) FOR [33QM] (CHECK VALVE-FUEL PUMP,L WING TK OUTR), [34QM] (CHECK VALVE-FUEL PUMP, L WING TK INR)
Install 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-400-001).
(b) FOR [35QM] (CHECK VALVE-FUEL PUMP, R WING TK INR), [36QM] (CHECK VALVE-FUEL PUMP, R WING TK OUTR)
Install 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-400-001).
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 28-21-43-710-051-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 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 |
| 123VU | L WING TK/PUMP 1/STBY SPLY | 11QA | AD12 |
| 123VU | R WING TK/PUMP 1/STBY SPLY | 12QA | AE12 |
E. Operational Test
(1) Do the operational test of the check valves 33QM (36QM) and 34QM (35QM) (Ref. AMM TASK 28-21-00-710-002).
5. Close-up(1) Do the operational test of the check valves 33QM (36QM) and 34QM (35QM) (Ref. AMM TASK 28-21-00-710-002).
Subtask 28-21-43-860-051-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).
Subtask 28-21-43-942-051-A ** ON A/C NOT FOR ALL (1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).
B. Removal of Equipment
(1) Remove the SAFETY BARRIERS.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Remove the SAFETY BARRIERS.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.