W DOC AIRBUS | AMM A320F

Installation of the Fuel-Pump Pressure-Switch

TASK 28-21-15-400-001-A
Installation of the Fuel-Pump Pressure-Switch

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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.
CAUTION: BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:
  • DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
  • DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
  • MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.
FIN: 23QA
FIN: 24QA
FIN: 27QA
FIN: 28QA
FIN: 39QA ** ON A/C NOT FOR ALL
FIN: 40QA ** ON A/C NOT FOR ALL
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
ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific
AR
SAFETY BARRIER(S)
No specific
Torque wrench: range to between 2.0 and 1.75 m.daN (14.75 and 12.91 lbf.ft ) T
No specific
Torque wrench: range to between 4.3 and 3.9 m.daN (31.71 and 28.76 lbf.ft ) T
FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK)
FOR [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK)
FOR [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK)
FOR [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
No specific
Torque wrench: range to between 2.0 and 1.75 m.daN (14.75 and 12.91 lbf.ft ) T
FOR [39QA] (PRESS SW-FUEL PUMP NO 1, CTR TK)
FOR [40QA] (PRESS SW-FUEL PUMP NO 2, CTR TK)
No specific
Torque wrench: range to between 3.22 and 2.69 m.daN (23.75 and 19.84 lbf.ft ) T
 B. Consumable Materials
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.14QFB1)
Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)
Textile-Lint free Cotton -
FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK)
FOR [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK)
FOR [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK)
FOR [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
(Material No.06ABA1)
Polysulfide Sealant-Fuel Tank Brushable -
(Material No.06ABF1)
Polysulfide Sealant-Fuel Tank Quick Curing -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [39QA] (PRESS SW-FUEL PUMP NO 1, CTR TK)
734
FOR [40QA] (PRESS SW-FUEL PUMP NO 2, CTR TK)
744
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK)
FOR [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK)
5
O-RING
AIPC 28-21-05-42-020
2
O-RING
AIPC 28-21-05-42-050
4
O-RING
AIPC 28-21-05-42-050
2
O-RING
AIPC 28-21-85-33-020
4
O-RING
AIPC 28-21-85-33-020
5
O-RING
AIPC 28-21-85-33-020
FOR [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK)
FOR [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
5
O-RING
AIPC 28-21-05-43-020
2
O-RING
AIPC 28-21-05-43-050
4
O-RING
AIPC 28-21-05-43-050
2
O-RING
AIPC 28-21-85-34-020
4
O-RING
AIPC 28-21-85-34-020
5
O-RING
AIPC 28-21-85-34-020
FOR [39QA] (PRESS SW-FUEL PUMP NO 1, CTR TK)
FOR [40QA] (PRESS SW-FUEL PUMP NO 2, CTR TK)
2
O-RING
AIPC 28-21-03-01-040
4
O-RING
AIPC 28-21-03-01-040
5
O-RING
AIPC 28-21-03-01-040
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 12-11-28-650-003-A
Pressure Refuel with Automatic Control
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 28-00-00-910-001-A
Fuel Safety Procedures
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
F Fuel-Pump Pressure Switch ** ON A/C NOT FOR ALL
F Fuel-Pump Pressure Switch ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 28-21-15-941-052-A
A. Safety Precautions
WARNING: OBEY THE FUEL SAFETY PROCEDURES.
   (1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
   (2) Make sure that the SAFETY BARRIER(S) are in position.
Subtask 28-21-15-860-053-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in the applicable MLG bay.
   (2) Make sure that the CONTAINER 1 L (1/4 USGAL) below the applicable pressure switch.
Subtask 28-21-15-860-053-B ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) Make sure that the applicable MLG door 734(744) is open (Ref. AMM TASK 32-12-00-010-001).
   (2) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable MLG door actuator.
   (3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in the applicable MLG bay.
   (4) Make sure that the CONTAINER 1 L (1/4 USGAL) is below the applicable pressure switch.
Subtask 28-21-15-865-062-A
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
FOR FIN: 23QA (PRESS SWFUEL PUMP NO 1, L WING TK)
121VUFUEL/L WING TK/PUMP1 SPLY1QAN23
123VUL WING TK/PUMP 1/STBY SPLY11QAAD12
FOR FIN: 27QA (PRESS SWFUEL PUMP NO 2, L WING TK)
121VUFUEL/L WING TK/PUMP2 SPLY7QAN26
FOR FIN: 24QA (PRESS SWFUEL PUMP NO 1, R WING TK)
121VUFUEL/R WING TK/PUMP1 SPLY2QAQ23
123VUR WING TK/PUMP 1/STBY SPLY12QAAE12
FOR FIN: 28QA (PRESS SWFUEL PUMP NO 2, R WING TK)
121VUFUEL/R WING TK/PUMP2 SPLY8QAQ26
** ON A/C NOT FOR ALL
FOR FIN: 39QA (PRESS SWFUEL PUMP NO 1, CTR TK)
121VUFUEL/CTR TK/PUMP1 SPLY29QAP23
FOR FIN: 40QA (PRESS SWFUEL PUMP NO 2, CTR TK)
121VUFUEL/CTR TK/PUMP2 SPLY30QAP26
4. Procedure
CAUTION: BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:
  • DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
  • DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
  • MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.
Subtask 28-21-15-420-051-A ** ON A/C NOT FOR ALL
A. Preparation for Installation
   (1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the component interface and/or the adjacent area.
   (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) Lubricate the new O-rings that follow with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :
     (a) FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK), [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK)
The new AIPC 28-21-05-42-020 O-RING (5), the new AIPC 28-21-05-42-050 O-RING (4) and the new AIPC 28-21-05-42-050 O-RING (2)
     (b) FOR [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK), [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
The new AIPC 28-21-05-43-020 O-RING (5), the new AIPC 28-21-05-43-050 O-RING (4) and the new AIPC 28-21-05-43-050 O-RING (2).
Subtask 28-21-15-420-050-A ** ON A/C NOT FOR ALL
B. Installation of the Fuel-Pump Pressure-Switch
   (1) Remove the CAP - BLANKING from the sealing valve (3) and the pressure switch (7).
   (2) If removed, install the sealing valve (3) as follows:
     (a) Install the O-ring (2) on the sealing valve (3).
     (b) Install the sealing valve (3) to the bulkhead adapter (1).
     (c) TORQUE the sealing valve to between 4.3 and 3.9 m.daN (31.71 and 28.76 lbf.ft ) T.
   (3) Install the O-ring (4) in the pressure switch (7).
   (4) Install the O-ring (5) around the plug (6).
   (5) Install the pressure switch (7) on the sealing valve (3).
   (6) Install the plug (6).
   (7) TORQUE the plug (6) to between 2.0 and 1.75 m.daN (14.75 and 12.91 lbf.ft ) T.
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (8) Safety the plug (6) to the sealing valve (3) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (9) FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK), [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK), [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK), [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
Apply a layer of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to the ends of the lockwire.
NOTE: Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) is a fast curing sealant which can be applied if the sealant cure time is not sufficient before the aircraft flight.
   (10) Remove the CAP-BLANKING from each electrical connector and receptacle.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
   (11) Connect the electrical connector (8) to the pressure switch (7).
Subtask 28-21-15-420-051-B ** ON A/C NOT FOR ALL
C. Preparation for Installation
   (1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the component interfaces and the adjacent areas.
   (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) Lubricate the new O-rings that follow with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :
     (a) FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK), [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK)
The new AIPC 28-21-05-42-020 O-RING (5) or AIPC 28-21-85-33-020 O-RING (5), the new AIPC 28-21-05-42-050 O-RING (4) or AIPC 28-21-85-33-020 O-RING (4) and the new AIPC 28-21-05-42-050 O-RING (2) or AIPC 28-21-85-33-020 O-RING (2)
     (b) FOR [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK), [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
The new AIPC 28-21-05-43-020 O-RING (5) or AIPC 28-21-85-34-020 O-RING (5), the new AIPC 28-21-05-43-050 O-RING (4) or AIPC 28-21-85-34-020 O-RING (4) and the new AIPC 28-21-05-43-050 O-RING (2) or AIPC 28-21-85-34-020 O-RING (2).
     (c) FOR [39QA] (PRESS SW-FUEL PUMP NO 1, CTR TK), [40QA] (PRESS SW-FUEL PUMP NO 2, CTR TK)
The new AIPC 28-21-03-01-040 O-RING (5), the new AIPC 28-21-03-01-040 O-RING (4) and the new AIPC 28-21-03-01-040 O-RING (2).
Subtask 28-21-15-420-050-B ** ON A/C NOT FOR ALL
D. Installation of the Fuel-Pump Pressure-Switch
   (1) Remove the CAP - BLANKING from the sealing valve (3) and the pressure switch (7).
   (2) If removed, install the sealing valve (3) as follows:
     (a) Install the O-ring (2) on the sealing valve (3).
     (b) Install the sealing valve (3) to the bulkhead adapter (1).
     (c) TORQUE the sealing valve (3) to between 4.3 and 3.9 m.daN (31.71 and 28.76 lbf.ft ) T.
   (3) Install the O-ring (4) in the pressure switch (7).
   (4) Install the O-ring (5) around the plug (6).
   (5) Install the pressure switch (7) on the sealing valve (3).
   (6) Install the plug (6).
   (7) TORQUE the plug (6):
     (a) FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK), [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK), [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK), [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
TORQUE the plug (6) to between 2.0 and 1.75 m.daN (14.75 and 12.91 lbf.ft ) T.
     (b) FOR [39QA] (PRESS SW-FUEL PUMP NO 1, CTR TK), [40QA] (PRESS SW-FUEL PUMP NO 2, CTR TK)
TORQUE the plug (6) to between 3.22 and 2.69 m.daN (23.75 and 19.84 lbf.ft ) T.
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
   (8) Safety the plug (6) to the sealing valve (3) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (9) FOR [23QA] (PRESS SW-FUEL PUMP NO 1, L WING TK), [24QA] (PRESS SW-FUEL PUMP NO 1, R WING TK), [27QA] (PRESS SW-FUEL PUMP NO 2, L WING TK), [28QA] (PRESS SW-FUEL PUMP NO 2, R WING TK)
Apply a layer of Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) or Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) to the ends of the lockwire.
NOTE: Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) is a fast curing sealant which can be applied if the sealant cure time is not sufficient before the aircraft flight.
   (10) Remove the CAP-BLANKING from each electrical connector and receptacle.
CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
   (11) Connect the electrical connector (8) to the pressure switch (7).
Subtask 28-21-15-860-051-A
E. Aircraft Configuration
   (1) Make sure that the applicable fuel tank contains a minimum of 750 kg (1653 lb). Refuel if applicable (Ref. AMM TASK 12-11-28-650-003).
Subtask 28-21-15-865-063-A
F. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
FOR FIN: 23QA (PRESS SWFUEL PUMP NO 1, L WING TK)
121VUFUEL/L WING TK/PUMP1 SPLY1QAN23
123VUL WING TK/PUMP 1/STBY SPLY11QAAD12
FOR FIN: 27QA (PRESS SWFUEL PUMP NO 2, L WING TK)
121VUFUEL/L WING TK/PUMP2 SPLY7QAN26
FOR FIN: 24QA (PRESS SWFUEL PUMP NO 1, R WING TK)
121VUFUEL/R WING TK/PUMP1 SPLY2QAQ23
123VUR WING TK/PUMP 1/STBY SPLY12QAAE12
FOR FIN: 28QA (PRESS SWFUEL PUMP NO 2, R WING TK)
121VUFUEL/R WING TK/PUMP2 SPLY8QAQ26
** ON A/C NOT FOR ALL
FOR FIN: 39QA (PRESS SWFUEL PUMP NO 1, CTR TK)
121VUFUEL/CTR TK/PUMP1 SPLY29QAP23
FOR FIN: 40QA (PRESS SWFUEL PUMP NO 2, CTR TK)
121VUFUEL/CTR TK/PUMP2 SPLY30QAP26
Subtask 28-21-15-790-050-A
G. Test
   (1) Push (in) the applicable TK PUMP P/BSW.
   (2) Make sure that the applicable TK PUMP P/BSW OFF light goes off and the FAULT comes on momentarily.
   (3) Examine the applicable fuel-pump pressure switch (7) for leaks.
5. Close-up
Subtask 28-21-15-860-052-A
A. Aircraft Configuration
   (1) De-energize the aircraft electrical circuits and disconnect the electrical ground power unit (Ref. AMM TASK 24-41-00-862-002).
Subtask 28-21-15-410-051-A ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the access platform(s).
Subtask 28-21-15-410-051-B ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the access platform(s).
   (3) Close the applicable main-gear door (Ref. AMM TASK 32-12-00-410-001):
     (a) FOR [39QA] (PRESS SW-FUEL PUMP NO 1, CTR TK)
close 734
     (b) FOR [40QA] (PRESS SW-FUEL PUMP NO 2, CTR TK)
close 744.
Subtask 28-21-15-942-050-A
C. Removal of Equipment
   (1) Remove the safety barriers.
   (2) Remove the WARNING NOTICE(S).
   (3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.10 from 2021] 2026.04.02 07:02:44 UTC
"WTRUIB" 2025