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 Loss 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

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-50-00-710-001 Ground Scanning of the Central Warning System AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit
 (ECU)(4000KS) AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU) (1KS1,1KS2) AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)
 (1KS1,1KS2) ASM 73-25/05 ASM 73-25/06
 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/2/FADEC A/AND EIU 2 2KS2 A05 121VU ENGINE/ENG2/FADEC B 4KS2 Q40
 B. Do the operational test of the Central Warning Systems (FWC) (Ref. AMM TASK 31-50-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message FWC2 : NO DATA FROM EIU2:
 - do a check for 28VDC at EIU 2 pins AC/9, 11.
 (1) If there is 28VDC:
 - replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040) (Ref. ASM 73-25/05).
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 - 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).
 (3) If the fault continues:
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 B. Do the test given in Para. 3.
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 TASK 73-20-00-810-848
 Loss 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

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-32-00-869-002 Procedure for Class 3 Faults Reading AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit
 (ECU)(4000KS)
 AMM 73-25-34-000-040 Removal of the Engine Interface Unit (EIU)
 (1KS1,1KS2)
 AMM 73-25-34-400-040 Installation of the Engine Interface Unit (EIU)

 (1KS1,1KS2)
 ASM 73-25/05
 ASM 73-25/06

 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/2/FADEC A/AND EIU 2 2KS2 A05 121VU ENGINE/ENG2/FADEC B 4KS2 Q40
 B. Test On the CFDS MENU page, get access to the AVIONICS STATUS page (Ref. AMM TASK 31-32-00-869-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message NO EIU2 DATA:
 - do a check for 28VDC at EIU 2 pins AC/9, 11.
 (1) If there is 28VDC:
 - replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040) (Ref. ASM 73-25/05).
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