W DOC AIRBUS | TSM A320F

Disagree between the EGT Indication and the ECU Output on Engine 1

TASK 77-00-00-810-823-A
Disagree between the EGT Indication and the ECU Output on Engine 1

1. Possible Causes
  • EGT thermocouple
  • CJ13 harness
  • CJ13 and HJ13 harnesses
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
BRUSH - BRISTLED
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP2011)
stoddard solvent
 C. Referenced Information
REFERENCE
DESIGNATION
AMM 73-21-50-210-001
Visual Inspection of the Wiring Harness
AMM 73-21-50-210-002
Visual Inspection of the Wiring Harnesses
AMM 77-21-10-000-001
Removal of the Upper Extension Lead
AMM 77-21-10-000-002
Removal of the Main Junction Box
AMM 77-21-10-000-008
Removal of the Upper Extension Lead
AMM 77-21-10-000-025
Removal of the Main Junction Box
AMM 77-21-10-400-001
Installation of the Upper Extension Lead
AMM 77-21-10-400-002
Installation of the Main Junction Box
AMM 77-21-10-400-008
Installation of the Upper Extension Lead
AMM 77-21-10-400-025
Installation of the Main Junction Box
3. Fault Confirmation
Subtask 77-00-00-710-074-A ** ON A/C NOT FOR ALL
A. Test.
   (1) Not applicable.
4. Fault Isolation
Subtask 77-00-00-810-062-A ** ON A/C NOT FOR ALL
A. The ECAM warning message ENG 1 EGT DISCREPANCY is generated if the cockpit indicated EGT and the EGT output selected from the ECU disagree.
   (1) If the symptom ENG 1 EGT DISCREPANCY is not confirmed:
     (a) No maintenance action is required.
   (2) If the symptom ENG 1 EGT DISCREPANCY is repetitive or confirmed:
  • disconnect the CJ13 harness from T49.5 junction box receptacle (located in the left core compartment).
     (a) Visually examine the T49.5 junction box receptacle and the CJ13 harness connector for damaged pin or contamination AMM 73-21-50-210-001.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
  • do a cleaning of the connector and receptacle using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-001.
     (b) If the fault continues during the subsequent flights:
     (c) If the fault continues during the subsequent flights:
Subtask 77-00-00-810-062-B ** ON A/C NOT FOR ALL
A. The ECAM warning message ENG 1 EGT DISCREPANCY is generated if the cockpit indicated EGT and the EGT output selected from the ECU disagree.
   (1) Disconnect harnesses from the EGT sensor receptacles, HJ13 and CJ13 (upper right hand and left hand thermocouple connectors, lower left hand and right hand thermocouple connectors).
     (a) Visually examine the receptacle and the connector for damaged pins or contamination AMM 73-21-50-210-002.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
  • do a cleaning of the connector and receptacle using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
   (2) Disconnect harnesses from the ECU (4000KS), HJ3 and HJ4.
     (a) Visually examine the receptacle and the connector for damaged pins or contamination AMM 73-21-50-210-002.
       1 If damage is found:
  • repair or replace as required.
       2 If no damage is found:
  • do a cleaning of the connector and receptacle using a BRUSH - BRISTLED with stoddard solvent (Material No.CP2011) AMM 73-21-50-210-002.
     (b) If the fault continues during the subsequent flights:
     (c) If the fault continues during the subsequent flights:
Subtask 77-00-00-710-075-A ** ON A/C NOT FOR ALL
B. No additionnal maintenance action is required if the fault is not confirmed.
   (1) Repeat the fault isolation procedure if the fault continues.
[Rev.8 from Aug 2018] 2026.04.04 04:37:31 UTC
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