Failure of the Cooling System of the EWD DU
 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 DU EWD(4WT1)/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 inlet and outlet of the EWD DU
 (a) If you find damage, repair it.
 5. Close-up
________
 A. Do the test given in Para. 3.A.

 Failure of the Cooling System of the SD DU
 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 DU SD(4WT2)/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 inlet and outlet of the SD DU
 (a) If you find damage, repair it.
 5. Close-up
________
 A. Do the test given in Para. 3.A.

 Failure of the DMC1 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 DMC1(1WT1)/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 1
 (a) If you find damage, repair it.
 5. Close-up
________
 A. Do the test given in Para. 3.A.

 Failure of the DMC2 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).
　
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