W DOC AIRBUS | TSM A320F

Internal Failure of the ECU - CPU FAULT - Engine 1 - Channel A

TASK 73-20-81-810-835-A
Internal Failure of the ECU - CPU FAULT - Engine 1 - Channel A

1. Possible Causes
2. Job Set-up Information
 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)
3. Fault Confirmation
Subtask 73-20-81-710-084-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 1A on the ground (with engine non motoring) AMM 73-29-00-710-040.
Subtask 73-20-81-710-084-B ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 1A on the ground (with engine non motoring) AMM 73-29-00-710-040.
4. Fault Isolation
Subtask 73-20-81-810-084-A ** ON A/C NOT FOR ALL
A. This failure message is generated when there is an internal ECU processing fault.
   (1) If the failure message ECU (CPU FAULT) is not confirmed:
  • no maintenance action is required.
   (2) If the failure message ECU (CPU FAULT) is not confirmed, but is repetitive:
   (3) If the failure message ECU (CPU FAULT) is confirmed:
Subtask 73-20-81-810-084-B ** ON A/C NOT FOR ALL
A. This failure message is generated when there is an internal ECU processing fault.
   (1) If the failure message ECU (CPU FAULT) is not confirmed:
  • no maintenance action is required.
   (2) If the failure message ECU (CPU FAULT) is not confirmed, but is repetitive:
   (3) If the failure message ECU (CPU FAULT) is confirmed:
Subtask 73-20-81-710-180-A ** ON A/C NOT FOR ALL
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.
[Rev.8 from Aug 2018] 2026.04.04 04:35:36 UTC
"WTRUIB" 2025