DOC AIRBUS | TSM A320FLoss of the EIU 1
1. Possible Causes
· EIU-1 ( 1KS1 )
· EEC ( 4000KS )
· wiring from the circuit breaker 4KS1 to the EIU 1 (1KS1) pin AC/9
· wiring from the circuit breaker 2KS1 to the EIU 1 (1KS1) pin AC/11
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
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)
Ref. ASM 73-25-05
Ref. AMM 73-25-34-000-041 Removal of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-400-041 Installation of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-710-042 Operational Test of the EIU with the CFDS
3. Fault Confirmation
Subtask 73-25-00-710-050-A
A. Test
(1) Do the operational test of the EIU 1 with the CFDS Ref. AMM 73-25-34-710-042 .
4. Fault Isolation
Subtask 73-25-00-810-050-A
A. If the operational test gives the maintenance message EIU 1:
· replace the EIU-1 ( 1KS1 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
(1) If the fault continues:
· replace the EEC ( 4000KS ) , Ref. AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
(2) If the fault continues:
· do a check and repair the:
. wiring from the circuit breaker 4KS1 to the EIU 1 (1KS1) pin AC/9
. wiring from the circuit breaker 2KS1 to the EIU 1 (1KS1) pin AC/11
Ref. ASM 73-25-05.
Subtask 73-25-00-710-051-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:36:20 UTC