DOC AIRBUS | TSM A320FInternal Failure of the ECU on Engine 1
TASK 73-20-00-810-959-A
Internal Failure of the ECU on Engine 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 73-20-00-710-286-A ** ON A/C NOT FOR ALL
Subtask 73-20-00-810-241-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:30 UTC
Internal Failure of the ECU on Engine 1
1. Possible Causes
- ECU [4000KS]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| 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) |
| AMM 75-24-49-210-040 | Visual inspection of the ECU Air Cooling Tubes and Ducts |
Subtask 73-20-00-710-286-A ** ON A/C NOT FOR ALL
A. Test
(1) Do the operational test of the FADEC 1B on the ground (with engine non motoring) AMM 73-29-00-710-040.
(2) Read the TROUBLE SHOOTING DATA of the FADEC MENU on the MCDU (Ref. 70-00-00, P. Block 301).
4. Fault Isolation(1) Do the operational test of the FADEC 1B on the ground (with engine non motoring) AMM 73-29-00-710-040.
(2) Read the TROUBLE SHOOTING DATA of the FADEC MENU on the MCDU (Ref. 70-00-00, P. Block 301).
Subtask 73-20-00-810-241-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ECU and the TROUBLE SHOOTING DATA gives the complementary information (ECU OVERTEMPERATURE):
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
NOTE: Before the installation of the new ECU, do a check of the ECU air cooling system to make sure that the inlet and outlet ports are not clogged AMM 75-24-49-210-040.