DOC AIRBUS | AMM A320FInstallation of the Fuel Differential Pressure Switch [IAE]
TASK 73-34-15-400-010-A
Installation of the Fuel Differential Pressure Switch
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 73-34-15-860-050-A ** ON A/C NOT FOR ALL
Subtask 73-34-15-420-051-A ** ON A/C NOT FOR ALL
Subtask 73-34-15-410-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:01:43 UTC
Installation of the Fuel Differential Pressure Switch
WARNING:
DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
- FLUSH IT AWAY WITH CLEAN WATER
- GET MEDICAL AID.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
FIN: 4000EL ** ON A/C NOT FOR ALL
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-002) | cleaning fluid |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 1 | SEALS | AIPC 73-34-15-80-030 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
| TASK 70-23-13-911-010-A | Procedures for the Installation of Preformed Packings |
| TASK 70-23-15-912-010-A | Connection of Electrical Connectors |
| TASK 71-00-00-710-012-B | Test No.3 : Idle Leak Check |
| TASK 71-00-00-710-045-A | Test No.1 : Dry Motor Leak Check |
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
Fuel Filter Differential Pressure SwitchSubtask 73-34-15-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 73-34-15-010-052-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 73-34-15-630-050-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
C. Remove the covers from the openings.
Subtask 73-34-15-110-050-A ** ON A/C NOT FOR ALL D. Safety Precautions
(1) Use a clean, Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) (Ref 70-30-00) to clean the mating face on the fuel filter housing.
Subtask 73-34-15-210-050-A ** ON A/C NOT FOR ALL (1) Use a clean, Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) (Ref 70-30-00) to clean the mating face on the fuel filter housing.
E. Make sure that the mating face on the fuel filter housing has no damage.
4. ProcedureSubtask 73-34-15-420-051-A ** ON A/C NOT FOR ALL
A. Installation of the Fuel Filter Pressure Switch
(1) Install the fuel filter differential pressure switch:
(a) Put new AIPC 73-34-15-80-030 SEALS (1) on the switch (4) (Ref. AMM TASK 70-23-13-911-010).
(b) Put the switch in position on the fuel filter housing.
(c) Attach the switch with the bolts (2).
(d) TORQUE the bolts to between 110 and 90 lbf.in (1.24 and 1.02 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(2) Connect the electrical connector 4002EL-A (3) to the switch (4)
(Ref. AMM TASK 70-23-15-912-010).
5. Close-up(1) Install the fuel filter differential pressure switch:
(a) Put new AIPC 73-34-15-80-030 SEALS (1) on the switch (4) (Ref. AMM TASK 70-23-13-911-010).
(b) Put the switch in position on the fuel filter housing.
(c) Attach the switch with the bolts (2).
(d) TORQUE the bolts to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (2) Connect the electrical connector 4002EL-A (3) to the switch (4)
(Ref. AMM TASK 70-23-15-912-010).
Subtask 73-34-15-410-051-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) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Remove the WARNING NOTICE(S).
Subtask 73-34-15-790-050-B ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Remove the WARNING NOTICE(S).
B. Do an idle leak check (Ref. AMM TASK 71-00-00-710-012).
NOTE: A dry motor leak check (Ref. AMM TASK 71-00-00-710-045) may be used to check for leaks, but this must be followed by an idle leak check (Ref. AMM TASK 71-00-00-710-012).