DOC AIRBUS | TSM A320FFailure of the ENG 1/MODE Selector Switch
1. Possible Causes
· SEL SW-ENG/MODE/CRANK/AUTO IGN/IGN ( 6KS )
· EIU-1 ( 1KS1 )
· wiring from the pins A/G, D, A of the ENG panel (115VU) to the pins AA/1C, 1A, 1B of the EIU 1 (1KS1)
· wiring from the pin A/M of the ENG panel (115VU) to the ground
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AWM 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 76-12-00-710-054-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 76-12-00-810-052-A
A. If the operational test gives the maintenance message 115VU (CRANK/MODE AUTO/IGN SEL SW):
· replace the SEL SW-ENG/MODE/CRANK/AUTO IGN/IGN ( 6KS ) .
(1) If the fault continues:
· replace the EIU-1 ( 1KS1 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
(2) If the fault continues:
· do a check and repair the:
wiring from the pins A/G, D, A of the ENG panel (115VU) to the pins AA/1C, 1A, 1B
of the EIU 1 (1KS1) .
wiring from the pin A/M of the ENG panel (115VU) to the ground , Ref. AWM
73-25-09.
Subtask 76-12-00-710-055-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:37:30 UTC