DOC AIRBUS | TSM A320FFailure of the ECU PS3 Pressure Sensor - Engine 1 - Channel A and Channel B
TASK 73-20-00-810-969-A
Failure of the ECU PS3 Pressure Sensor - Engine 1 - Channel A and Channel B
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 73-20-00-710-306-A ** ON A/C NOT FOR ALL
Subtask 73-20-00-810-264-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:31 UTC
Failure of the ECU PS3 Pressure Sensor - Engine 1 - Channel A and Channel B
1. Possible Causes
- PS3 line
- ECU [4000KS]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 72-00-00-200-026 | Inspection/Check of the PS3 Line |
| AMM 72-00-00-200-029 | Inspection/Check of the PS3 Line |
| AMM 72-00-00-220-001 | Inspection of the PS3 Line Connections |
| AMM 73-21-60-000-001 | Removal of the Electronic Control Unit (ECU) |
| AMM 73-21-60-400-001 | Installation of the Electronic Control Unit (ECU) |
| AMM 73-29-00-710-040 | Operational Test of the FADEC on the ground (with Engine Motoring) |
Subtask 73-20-00-710-306-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 1A and 1B on the ground (with engine non motoring) AMM 73-29-00-710-040.
4. Fault IsolationSubtask 73-20-00-810-264-A ** ON A/C NOT FOR ALL
A. This failure message is generated if the PS3 line is leaking, blocked or an internal ECU processing error has occurred.
(1) If the failure messages ECU, PS3 SNSR LINE + ECU, PS3 SNSR LINE are not confirmed:
(a) Inspect PS3 line:
Subtask 73-20-00-810-264-B ** ON A/C NOT FOR ALL (1) If the failure messages ECU, PS3 SNSR LINE + ECU, PS3 SNSR LINE are not confirmed:
(a) Inspect PS3 line:
- do a visual check of the PS3 line for dents, cracks, wear and weep holes free from obstruction AMM 72-00-00-200-029 and to make sure connections are properly tightened and in place AMM 72-00-00-220-001.
- replace or retighten PS3 line AMM 72-00-00-220-001.
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
- replace the ECU (4000KS) AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
A. This failure message is generated if the PS3 line is leaking, blocked or an internal ECU processing error has occurred.
(1) If the failure messages ECU, PS3 SNSR LINE + ECU, PS3 SNSR LINE are not confirmed:
(a) Inspect PS3 line:
Subtask 73-20-00-710-307-A ** ON A/C NOT FOR ALL (1) If the failure messages ECU, PS3 SNSR LINE + ECU, PS3 SNSR LINE are not confirmed:
(a) Inspect PS3 line:
- do a visual check of the PS3 line for dents, cracks, wear and weep holes free from obstruction AMM 72-00-00-200-026 and to make sure connections are properly tightened and in place AMM 72-00-00-220-001.
- replace or retighten PS3 line AMM 72-00-00-220-001.
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
- replace the ECU (4000KS) AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
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.