DOC AIRBUS | TSM A320FFuel Filter Clogged Indication on Engine 1
TASK 73-00-00-810-875-A
Fuel Filter Clogged Indication on Engine 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 73-00-00-710-196-A ** ON A/C NOT FOR ALL
Subtask 73-00-00-810-125-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:12 UTC
Fuel Filter Clogged Indication on Engine 1
1. Possible Causes
- fuel filter element
- fuel tank biological contamination
- SW-FUEL FILTER DIFF PRESS [4000EL]
- wiring
- SDAC-1 [1WV1]
- SDAC-2 [1WV2]
- DMC-1 [1WT1]
- DMC-2 [1WT2]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-55-34-000-001 | Removal of the SDAC |
| AMM 31-55-34-400-001 | Installation of the SDAC |
| AMM 31-63-34-000-001 | Removal of the DMC |
| AMM 31-63-34-400-001 | Installation of the DMC |
| AMM 71-00-00-710-006 | Minimum Idle Check |
| AMM 73-11-10-000-002 | Removal of the Fuel Filter Element |
| AMM 73-11-10-000-004 | Removal of the Fuel Filter Element |
| AMM 73-11-10-210-003 | Visual Inspection of the Fuel Filter Cartridge |
| AMM 73-11-10-210-004 | Visual Inspection of the Fuel Filter Cartridge |
| AMM 73-11-10-400-002 | Installation of the Fuel Filter Element |
| AMM 73-11-10-400-004 | Installation of the Fuel Filter Element |
| ASM 733402 | |
| AMM 73-34-15-000-040 | Removal of the Fuel Filter Differential Pressure Switch |
| AMM 73-34-15-000-041 | Removal of the Fuel Filter Differential Pressure Switch |
| AMM 73-34-15-400-040 | Installation of the Fuel Filter Differential Pressure Switch |
| AMM 73-34-15-400-041 | Installation of the Fuel Filter Differential Pressure Switch |
Subtask 73-00-00-710-196-A ** ON A/C NOT FOR ALL
A. Test
(1) Not applicable.
4. Fault Isolation(1) Not applicable.
Subtask 73-00-00-810-125-A ** ON A/C NOT FOR ALL
A. The ECAM warning is triggered if a clogging of the fuel filter is detected.
(1) Do the following checks:
Subtask 73-00-00-810-125-B ** ON A/C NOT FOR ALL (1) Do the following checks:
CAUTION:
YOU MUST DO THE MAINTENANCE OPERATION IF YOU FIND BRONZE PARTICLES IN THE FUEL FILTER ELEMENT.
BRONZE PARTICLES ARE A SIGN OF ENGINE DAMAGE. IF YOU DO NOT DO MAINTENANCE, MORE DAMAGE WILL OCCUR TO THE ENGINE. IT WILL THEN BE NECESSARY TO REPLACE THE FUEL SYSTEM COMPONENTS.
(a) Remove the fuel filter element AMM 73-11-10-000-002: - do a visual inspection of the fuel filter element for signs of contamination AMM 73-11-10-210-004.
NOTE: A fuel tank biological contamination may lead to clogging of the fuel filter.
(b) If nothing is found: - install a new fuel filter element AMM 73-11-10-400-002.
- replace the SW-FUEL FILTER DIFF PRESS [4000EL] AMM 73-34-15-000-040 and AMM 73-34-15-400-040.
- check the wiring between the fuel filter differential pressure switch 4000EL and SDAC1/SDAC2 for a short to ground ASM 733402,
- repair or replace wiring as required.
- replace SDAC-1 [1WV1] AMM 31-55-34-000-001 and AMM 31-55-34-400-001
- replace SDAC-2 [1WV2] AMM 31-55-34-000-001 and AMM 31-55-34-400-001
A. The ECAM warning is triggered if a clogging of the fuel filter is detected.
(1) Do the following checks:
Subtask 73-00-00-810-126-A ** ON A/C NOT FOR ALL (1) Do the following checks:
CAUTION:
YOU MUST DO THE MAINTENANCE OPERATION IF YOU FIND BRONZE PARTICLES IN THE FUEL FILTER ELEMENT.
BRONZE PARTICLES ARE A SIGN OF ENGINE DAMAGE. IF YOU DO NOT DO MAINTENANCE, MORE DAMAGE WILL OCCUR TO THE ENGINE. IT WILL THEN BE NECESSARY TO REPLACE THE FUEL SYSTEM COMPONENTS.
(a) Remove the fuel filter element AMM 73-11-10-000-004: - do a visual inspection of the fuel filter element for signs of contamination AMM 73-11-10-210-003.
NOTE: A fuel tank biological contamination may lead to clogging of the fuel filter.
(b) If nothing is found: - install a new fuel filter element AMM 73-11-10-400-004.
- replace the SW-FUEL FILTER DIFF PRESS [4000EL] AMM 73-34-15-000-041 and AMM 73-34-15-400-041.
- check the wiring between the fuel filter differential pressure switch 4000EL and SDAC1/SDAC2 for a short to ground ASM 733402,
- repair or replace wiring as required.
- replace SDAC-1 [1WV1] AMM 31-55-34-000-001 and AMM 31-55-34-400-001
- replace SDAC-2 [1WV2] AMM 31-55-34-000-001 and AMM 31-55-34-400-001
B. If there are no messages with the DMC3 switched on:
(1) Replace the DMC-1 [1WT1] for the upper ECAM display unit and/or the DMC-2 [1WT2] for the lower ECAM display unit AMM 31-63-34-000-001 and AMM 31-63-34-400-001.
Subtask 73-00-00-710-265-A ** ON A/C NOT FOR ALL (1) Replace the DMC-1 [1WT1] for the upper ECAM display unit and/or the DMC-2 [1WT2] for the lower ECAM display unit AMM 31-63-34-000-001 and AMM 31-63-34-400-001.
C. Do a minimum idle check AMM 71-00-00-710-006.
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.