(a) If the fault continues:
 - replace the LGCIU-1 (5GA1) and/or the LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 B. Do the operational test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 265
 May 01/05R
 CES

 TASK 21-26-00-810-822

 Loss of the Information from the EIUs
 1. Possible Causes
_______________
 - EIU-1 (1KS1)

 - EIU-2 (1KS2)

 - AEVC (10HQ)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 21-26-00-710-001 Operational Check of System via MCDU AMM 21-26-34-000-001 Removal of the Avionics Equipment Ventilation Computer (AEVC) (10HQ) AMM 21-26-34-400-001 Installation of the Avionics Equipment Ventilation Computer (AEVC) (10HQ) 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 21-26/02
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 21-26-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK EIU - AEVC INTFC:
 - make sure that there is no ground at pins AB/10A and AB/11A of the AEVC (10HQ).
 (1) If there is a ground signal:
 - do a check and repair the wiring between the AEVC (10HQ) and the EIU-1 (1KS1), pins AB/10A and pins AB/1G and/or do a check and repair the wiring between the AEVC (10HQ) and the EIU-2 (1KS2), pins AB/11A pins AB/1G (Ref. ASM 21-26/02).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 266
 May 01/05R CES

 (a) If the fault continues:
 - replace the EIU-1 (1KS1) if the ground is at the pin AB/10A of the AEVC (10HQ) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).

 - replace the EIU-2 (1KS2) if the ground is at the pin AB/11A of the AEVC (10HQ) (Ref. AMM TASK 73-25-34-000-040) and (Ref. AMM TASK 73-25-34-400-040).

 (2) If there is no ground signal:
 - replace the AEVC (10HQ) (Ref. AMM TASK 21-26-34-000-001) and (Ref. AMM TASK 21-26-34-400-001).
 B. Do the operational test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞21-26-00∞∞∞∞∞∞∞∞∞∞Page 267
 May 01/05R
 CES

 TASK 21-26-00-810-824

 AVNCS SYS FAULT Warning Inoperative
 1. Possible Causes
_______________
 - AEVC (10HQ)

 - SDAC-1 (1WV1)

 - SDAC-2 (1WV2)

 - wiring between the AEVC (10HQ) and the SDAC-1 (1WV1)

 - wiring between the AEVC (10HQ) and the SDAC-2 (1WV2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-26-00-710-001 Operational Check of System via MCDU
 AMM 31-55-34-000-001 Removal of the SDAC (1WV1,1WV2)
 AMM 31-55-34-400-001 Installation of the SDAC (1WV1,1WV2)
 ASM 21-26/02

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the avionics equipment ventilation from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 21-26-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK SDAC - AEVC INTFC:
 - make sure that there is no ground at pins AB/10A and AB/11A of the AEVC (10HQ)
 (1) If there is a ground signal:

 - replace the AEVC (10HQ) (Ref. AMM TASK 31-55-34-000-001) and (Ref. AMM TASK 31-55-34-400-001).
　
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