DOC AIRBUS | TSM A320FDisagree between the Oil Pressure Transmitter and the Low Oil Pressure Switch on Engine 1
TASK 79-33-00-810-807-A
Disagree between the Oil Pressure Transmitter and the Low Oil Pressure Switch on Engine 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 79-33-00-710-062-A ** ON A/C NOT FOR ALL
Subtask 79-33-00-810-056-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:38:24 UTC
Disagree between the Oil Pressure Transmitter and the Low Oil Pressure Switch on Engine 1
1. Possible Causes
- SW-LOW OIL PRESS [4000EN]
- XMTR-OIL PRESS [4003EN]
wiring from the EIU 1 (1KS1) to the low oil pressure switch (4000EN) wiring from the EIU 1 (1KS1) to the oil pressure transmitter (4003EN) - EIU-1 [1KS1]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 73-25-34-000-040 | Removal of the Engine Interface Unit (EIU) |
| AMM 73-25-34-400-040 | Installation of the Engine Interface Unit (EIU) |
| AMM 73-25-34-710-041 | Read The Class 3 Faults |
| AMM 73-25-34-710-044 | Read the Class 3 Faults |
| AMM 79-33-15-000-040 | Removal of the Oil Pressure Transmitter |
| AMM 79-33-15-000-041 | Removal of the Oil Pressure Transmitter |
| AMM 79-33-15-400-040 | Installation of the Oil Pressure Transmitter |
| AMM 79-33-15-400-041 | Installation of the Oil Pressure Transmitter |
| AMM 79-34-15-000-040 | Removal of the Low Oil Pressure Switch |
| AMM 79-34-15-000-041 | Removal of the Low Oil Pressure Switch |
| AMM 79-34-15-400-040 | Installation of the Low Oil Pressure Switch |
| AMM 79-34-15-400-041 | Installation of the Low Oil Pressure Switch |
| ASM 793601 |
Subtask 79-33-00-710-062-A ** ON A/C NOT FOR ALL
A. Test
(1) Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) to read the Class 3 Faults AMM 73-25-34-710-041.
Subtask 79-33-00-710-062-B ** ON A/C NOT FOR ALL (1) Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) to read the Class 3 Faults AMM 73-25-34-710-041.
A. Test
(1) Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) to read the Class 3 Faults AMM 73-25-34-710-044.
4. Fault Isolation(1) Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) to read the Class 3 Faults AMM 73-25-34-710-044.
Subtask 79-33-00-810-056-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message OIL PRESS XMTR 1 4003EN OR LOW PRESS 1 SW 4000EN:
Subtask 79-33-00-810-056-B ** ON A/C NOT FOR ALL - replace the SW-LOW OIL PRESS [4000EN] AMM 79-34-15-000-040 and AMM 79-34-15-400-040.
- replace the XMTR-OIL PRESS [4003EN] AMM 79-33-15-000-040 and AMM 79-33-15-400-040.
- do a check of the
wiring from the EIU 1 (1KS1) to the low oil pressure switch (4000EN) and thewiring from the EIU 1 (1KS1) to the oil pressure transmitter (4003EN) pins AA/8D, 8B to pins AA/3, 4 ASM 793601, - repair or replace as required.
- replace the EIU-1 [1KS1] AMM 73-25-34-000-040 and AMM 73-25-34-400-040.
A. If the test gives the maintenance message OIL PRESS XMTR 1 4003EN OR LOW PRESS 1 SW 4000EN:
Subtask 79-33-00-710-063-A ** ON A/C NOT FOR ALL - replace the SW-LOW OIL PRESS [4000EN] AMM 79-34-15-000-041 and AMM 79-34-15-400-041.
- replace the XMTR-OIL PRESS [4003EN] AMM 79-33-15-000-041 and AMM 79-33-15-400-041.
- do a check of the
wiring from the EIU 1 (1KS1) to the low oil pressure switch (4000EN) and thewiring from the EIU 1 (1KS1) to the oil pressure transmitter (4003EN) pins AA/8D, 8B to pins AA/3, 4 ASM 793601, - repair or replace as required.
- replace the EIU-1 [1KS1] AMM 73-25-34-000-040 and AMM 73-25-34-400-040.
B. Do the test given in Para. 3.A.
(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.