DOC AIRBUS | TSM A320FLoss of the Output B Bus on EIU 2
1. Possible Causes
· EIU-2 ( 1KS2 )
· wiring from the EIU 2 (1KS2) pins AB/5H, 5K to the first terminal block
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 31-50-00-710-001 Ground Scanning of the Central Warning System
Ref. ASM 73-25-06
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)
3. Fault Confirmation
Subtask 73-20-00-865-053-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANEL DESIGNATION FIN LOCATION
49VU ENGINE/2/FADEC A/AND EIU 2 2KS2 A05
PANEL DESIGNATION FIN LOCATION
121VU ENGINE/ENG2/FADEC B/AND EIU 2 4KS2 Q40
Subtask 73-20-00-710-092-A
B. Test
(1) Do the operational test of the Central Warning Systems (FWC) Ref. AMM 31-50-00-710-001 .
4. Fault Isolation
Subtask 73-20-00-810-085-A
A. If the test gives the maintenance message FWC1 : NO DATA FROM EIU2:
· replace the EIU-2 ( 1KS2 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
(1) If the fault continues:
· do a check and repair the wiring from the EIU 2 (1KS2) pins AB/5H, 5K to the first terminal block ,
Ref. ASM 73-25-06.
Subtask 73-20-00-710-093-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:36:13 UTC