R TASK 21-26-00-040-008- 01 R Deactivation of the Skin-Exchanger Isolation Valve (24HQ) R 1. Reason for the Job
__________________
R Refer to the MMEL TASK: 21-26-06 b) R Avionics Equipment Ventilation R Skin Exchanger Isolation Valve
R 2. Job Set-up Information
______________________
R A. Fixtures, Tools, Test and Support Equipment
R -------------------------------------------------------------------------------R REFERENCE QTY DESIGNATION R -------------------------------------------------------------------------------
R No specific circuit breaker(s) safety clip(s) R No specific 1 ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE R No specific AR CAP - BLANKING R No specific 1 WARNING NOTICE
R B. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R 21-26-00-710-001 R 24-41-00-861-002 R R 24-41-00-862-002 R R 31-60-00-860-001 R 31-60-00-860-002 R 21-26-00-991-010 Operational Check of System via MCDU Energize the Aircraft Electrical Circuits from the External Power De-energize the Aircraft Electrical Circuits Supplied from the External Power EIS Start Procedure EIS Stop Procedure Fig. 403

R  3. Job Set-up__________ 
R  Subtask 21-26-00-861-083 
R  A. Aircraft Maintenance Configuration 
R  (1) Energize the aircraft electrical circuits 
R  (Ref. TASK 24-41-00-861-002). 
R  (2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) 
R  (Ref. TASK 31-60-00-860-001). 
R  Subtask 21-26-00-865-094 
R  B. Open, safety and tag this(these) circuit breaker(s): 
R  -------------------------------------------------------------------------------
R  PANEL DESIGNATION IDENT. LOCATION 
R  -------------------------------------------------------------------------------
R  49VU AIR COND/AVNCS VENT/CTL 6HQ D06 
R  Subtask 21-26-00-010-088 
R  C. Get Access 
R  (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the 
R  access door 824. 
R  (2) Open the access door 824. 
R  4. Procedure_________ 
R  (Ref. Fig. 403/TASK 21-26-00-991-010) 
R  Subtask 21-26-00-040-064 
R  A. Opening Procedure of the Skin-Exchanger Isolation Valve 
R  (1) Disconnect the connector 24HQ-A from the valve 24HQ. 
R  (2) Put CAP - BLANKING on the disconnected electrical connectors. 
R  (3) Keep the electrical cable and its connector near the valve. 
R  (4) Fully open the valve 24HQ with the manual mechanism.

R  (5) On the bottom part of the upper ECAM display unit: 
R  - the VENT AVNCS SYS FAULT warning comes into view. 
R  Ignore this warning. 
R  On the ECAM control panel: 
R  - push the CLR key. 
R  (6) Remove the safety clip(s) and the tag(s) and close this(these) 
R  circuit breaker(s): 
R  6HQ. 
R  (7) Do an operational test of the avionics equipment ventilation from the 
R  MCDU (Ref. TASK 21-26-00-710-001). 
R  5. Close-up________ 
R  Subtask 21-26-00-410-085 
R  A. Close Access 
R  (1) Make sure that the work area is clean and clear of tool(s) and other 
R  items. 
R  (2) Close the access door 822. 
R  (3) Remove the access platform(s). 
R  Subtask 21-26-00-942-080 
R  B. Safety Precautions 
R  (1) Put a WARNING NOTICE in position in the cockpit to tell the crew that 
R  the skin-exchanger isolation valve is deactivated. 
R  (2) Make an entry in the log book. 
R  Subtask 21-26-00-862-085 
R  C. Aircraft Maintenance Configuration 
R  (1) Do the EIS stop procedure 
R  (Ref. TASK 31-60-00-860-002). 
R  (2) De-energize the aircraft electrical circuits 
R  (Ref. TASK 24-41-00-862-002).

 TASK 21-26-00-440-008
1. Reason for the Job
R Reactivation of the Skin-Exchanger Isolation Valve (24HQ) __________________ Refer to the MMEL TASK: 21-26-06 Avionics Equipment Ventilation Skin Exchanger Isolation Valve
 2. Job Set-up Information
______________________
　
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