4. Fault Isolation
_______________
 A. If the test gives the maintenance message DMC2(1WT2)/COOLING
 - do the operational test of the avionics equipment ventilation (Ref. AMM TASK 21-26-00-710-001)
 (1) If the avionics ventilation system does not operate correctly:

 - do the related trouble shooting (Ref. TSM chapter 21)

 (2) If the avionics ventilation system operates correctly:

 - do a visual check of the cooling air openings of the DMC 2
 (a) If you find damage, repair it.
 5. Close-up
________
 A. Do the test given in Para. 3.A.

 Failure of the DMC3 Cooling System
 1. Possible Causes
_______________
 - avionics ventilation system
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 21-26-00-710-001 Operational Check of System via MCDU AMM 31-60-00-740-004 EIS System Test
 3. Fault Confirmation
__________________
 A. Test
 Do the EIS system test (Ref. AMM TASK 31-60-00-740-004).

 4. Fault Isolation
_______________
 A. If the test gives the maintenance message DMC3(1WT3)/COOLING
 - do the operational test of the avionics equipment ventilation (Ref. AMM TASK 21-26-00-710-001)
 (1) If the avionics ventilation system does not operate correctly:

 - do the related trouble shooting (Ref. TSM chapter 21)

 (2) If the avionics ventilation system operates correctly:

 - do a visual check of the cooling air openings of the DMC 3
 (a) If you find damage, repair it.
 5. Close-up
________
 A. Do the test given in Para. 3.A.

 Loss of the ADIRU 1 Data to the DMC
 1. Possible Causes
_______________
 - ADIRU-1 (1FP1)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
31-63-00-810-820 Loss of the ADC 1 Output Bus by the DMC 1 31-63-00-810-836 Loss of the ADC 1 Output Bus by the DMC 3 AMM 31-60-00-740-007 GROUND SCANNING Test of the DMC AMM 34-12-34-000-001 Removal of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-12-34-400-001 Installation of the ADIRU (1FP1, 1FP2, 1FP3)
 3. Fault Confirmation
__________________
 A. Test Do the Ground Scanning Test of the DMC (Ref. AMM TASK 31-60-00-740-007).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message ADIRU1(1FP1):
 - do the fault isolation (Para. 4. A.) of the following procedures (Ref. TASK 31-63-00-810-820) and (Ref. TASK 31-63-00-810-836).
 (1) If the fault continues:
 - replace the ADIRU-1 (1FP1) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001)
 5. Close-up
________
 A. Do the test given in Para. 3.A.

 TASK 31-63-00-810-992 Loss of the ADIRU 2 Data to the DMC
 1. Possible Causes
_______________
 - ADIRU-2 (1FP2)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
31-63-00-810-828 Loss of the ADC 2 Output Bus by the DMC 2 31-63-00-810-844 Loss of the ADC 2 Output Bus by the DMC 3 AMM 31-60-00-740-007 GROUND SCANNING Test of the DMC AMM 34-12-34-000-001 Removal of the ADIRU (1FP1, 1FP2, 1FP3) AMM 34-12-34-400-001 Installation of the ADIRU (1FP1, 1FP2, 1FP3)
 3. Fault Confirmation
__________________
 A. Test Do the Ground Scanning Test of the DMC (Ref. AMM TASK 31-60-00-740-007).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message ADIRU2(1FP2):
 - do the fault isolation (Para. 4. A.) of the following procedures (Ref. TASK 31-63-00-810-828) and (Ref. TASK 31-63-00-810-844).
 (1) If the fault continues:
 - replace the ADIRU-2 (1FP2) (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001)
 5. Close-up
________
 A. Do the test given in Para. 3.A.

 TASK 31-63-00-810-993 Loss of the ADIRU 3 Data to the DMC
 1. Possible Causes
_______________
 - ADIRU-3 (1FP3)
　
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