Disagree between the Channel A and Channel B Fuel-Flow Indication on Engine 1

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1. Possible Causes
· DMC-1 ( 1WT1 )
· DMC-2 ( 1WT2 )
· DMC-3 ( 1WT3 )
· FWC-1 ( 1WW1 )
· FWC-2 ( 1WW2 )
· EEC ( 4000KS )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 31-53-34-000-001 Removal of the Flight Warning Computer (FWC)
Ref. AMM 31-53-34-400-001 Installation of the Flight Warning Computer (FWC)
Ref. AMM 31-63-34-000-001 Removal of the DMC
Ref. AMM 31-63-34-400-001 Installation of the DMC
Ref. AMM 71-00-00-710-012 Test No.3 : Idle Leak Check
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
3. Fault Confirmation
Subtask 73-00-00-710-228-A
A. Test
(1) Not applicable.
4. Fault Isolation
Subtask 73-00-00-810-151-A
A. If the fault symptom is identified by the ECAM warning ENG1 FF DISCREPANCY:
· replace the DMC-1 ( 1WT1 ) Ref. AMM 31-63-34-000-001 and Ref. AMM 31-63-34-400-001 .
(1) If the fault continues:
· replace the DMC-2 ( 1WT2 ) Ref. AMM 31-63-34-000-001 and Ref. AMM 31-63-34-400-001 .
(2) If the fault continues:
· replace the DMC-3 ( 1WT3 ) Ref. AMM 31-63-34-000-001 and Ref. AMM 31-63-34-400-001 .
(3) If the fault continues:
· replace the FWC-1 ( 1WW1 ) Ref. AMM 31-53-34-000-001 and Ref. AMM 31-53-34-400-001 .
(4) If the fault continues:
· replace the FWC-2 ( 1WW2 ) Ref. AMM 31-53-34-000-001 and Ref. AMM 31-53-34-400-001 .
(5) If the fault continues:
· replace the EEC ( 4000KS ) Ref. AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 73-00-00-710-229-A
B. Test
(1) Do a minimum idle check to make sure that all engine instruments give the correct indication Ref.
AMM 71-00-00-710-012 . [Rev.6 from Feb 2017] 2026.04.04 04:36:08 UTC