DOC AIRBUS | TSM A320FDisagree between the L/G Signal Inputs on EIU 1
1. Possible Causes
· EIU-1 ( 1KS1 )
· LGCIU-1 ( 5GA1 )
· wiring from the EIU 1 (1KS1) to the LGCIU 1 (5GA1)
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 32-31-71-000-001 Removal of the LGCIU
Ref. AMM 32-31-71-400-001 Installation of the LGCIU
Ref. ASM 73-25-16
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 73-25-34-860-041 EIU DISCRETE OUTPUTS Simulation
3. Fault Confirmation
Subtask 73-25-00-710-102-A
A. Test
(1) Do the EIU DISCRETE OUTPUTS simulation and check the LOP GND1 discrete output status Ref.
AMM 73-25-34-860-041 .
4. Fault Isolation
Subtask 73-25-00-810-076-A
A. If the LOP GND1 discrete output status is 0:
· 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 LGCIU-1 ( 5GA1 ) , Ref. AMM 32-31-71-000-001 and Ref. AMM 32-31-71-400-001 .
(2) If the fault continues:
· do a check and repair the wiring from the EIU 1 (1KS1) to the LGCIU 1 (5GA1) pins AA/5D, 5E to
pins AB/3G, 3K Ref. ASM 73-25-16.
Subtask 73-25-00-710-103-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:36:22 UTC