TASK 73-25-00-810-908
 Loss of the Flight Data on the ARINC Bus from the EIU to the FADEC on Engine 2
 1. Possible Causes
_______________
 - EIU-2 (1KS2)

 - harness J3 from the EIU-2 (1KS2) to the ECU (4000KS)

 - wiring from CFDIU (1TW) to the EIU-2 (1KS2)

 - CFDIU (1TW)

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION

 -------------------------------------------------------------------------------
AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
 AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
 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) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring) ASM 73-25/06
 3. Fault Confirmation
__________________
 A. Do the operational test of the FADEC 2A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CFDIU, EIU (FLGT), J3*:
 - do a check for open or short to ground at pins AB/5A, 5C to pins J3/22, 23 of the harness J3 from the EIU-2 (1KS2) to the ECU (4000KS) and at pins AB/11D, 11E to pins AA/11C, 11B of the wiring from CFDIU (1TW) to the EIU-2 (1KS2) (Ref. ASM 73-25/06).
 (1) If one of these wirings is not correct:

 - repair the defective harness J3 or the wiring.

 (2) If these wirings are correct:

 - replace the EIU-2 (1KS2) (Ref. AMM TASK 73-25-34-000-040) (Ref. AMM TASK 73-25-34-400-040).
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E F 『 E C F M E E E E 56 E E E (3) If the fault continues:

 - replace the CFDIU (1TW) (Ref. AMM TASK 31-32-34-000-001) (Ref. AMM TASK 31-32-34-400-001).
 (4) If the fault continues:
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) (Ref. AMM TASK 73-21-60-400-001).
 B. Do the test given in Para. 3.A.
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 Loss of the 28VDC Power Supply of the ECU on the Engine 1
 1. Possible Causes
_______________
 - EIU-1 (1KS1)

 - ECU (4000KS)

 - aircraft wiring

 - C/B-ENGINE/1/FADEC A/AND EIU 1 (2KS1)

 - harness J1

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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) AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with
 Engine Motoring) ASM 73-25/05 ASM 73-25/08
 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU ENGINE/1/FADEC A/AND EIU 1 2KS1 A04
 B. Test
 (1) If the circuit breaker (2KS1) is open, refer to Para. 4.A.(2).

 (2) Do the operational test of the FADEC 1A on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).

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