DOC AIRBUS | TSM A320FFailure of the FAULT Legend Control on Engine 1
1. Possible Causes
· wiring from the EIU 1 (1KS1) to the relay (8LP)
· BOARD-ANN LT TEST & INTFC ( 8LP )
· EIU-1 ( 1KS1 )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. ASM 73-25-09
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 73-25-00-710-062-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 73-25-00-810-056-A
A. If the operational test gives the maintenance message CHECK 8LP RELAY CIRCUIT OR EIU1:
· do a check of the wiring from the EIU 1 (1KS1) to the relay (8LP) pin AB/9A to pin A/21 Ref. ASM
73-25-09.
(1) If there is no continuity:
· repair the above wiring.
(2) If there is continuity:
· replace the BOARD-ANN LT TEST & INTFC ( 8LP ) .
(a) If the fault continues:
· replace the EIU-1 ( 1KS1 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
Subtask 73-25-00-710-063-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:36:21 UTC