A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Close the access door 824 (Ref. TASK 52-41-00-410-002).

 (3)
 Remove the access platform(s).
 Subtask 21-26-00-869-101

 B. Aircraft Maintenance Configuration

 (1)
 Make an entry in the log book.
 Subtask 21-26-00-862-080

 C. De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

R TASK 21-26-00-040-009- 01
R Avionics Ventilation Filter Inoperative - Do the Deactivation of the R Conditioned-Air Inlet Valve (21HQ)
R 1. Reason for the Job
__________________
R Refer to the MMEL TASK: 21-26-09 c) R Avionics Equipment Ventilation R Ventilation filter
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 AR 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 52-41-00-410-002 R 21-26-00-991-009 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 Close the Avionics Compartment Doors after Access Fig. 404

R  3. Job Set-up__________ 
R  Subtask 21-26-00-861-084 
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 21-26-00-865-097 
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 5HQ D05 
R  Subtask 21-26-00-010-089 
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. 404/TASK 21-26-00-991-009) 
R  Subtask 21-26-00-040-065 
R  A. Opening Procedure of the Conditioned-Air Inlet Valve 
R  (1) On the VENTILATION section of the overhead panel 22VU: 
R  - release the EXTRACT pushbutton switch (the OVRD legend comes on). 
R  (2) On the conditioned-air inlet valve 21HQ: 
R  (a) Disconnect the connector 21HQ-A from the valve 21HQ. 
R  (b) Put CAP - BLANKING on the disconnected electrical connectors.

R  (c) Keep the electrical cable and its connector near the valve. 
R  (d) Fully open the valve 21HQ with the manual mechanism. 
R  (3) 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  (4) Remove the safety clip(s) and the tag(s) and close this(these) 
R  circuit breaker(s): 
R  5HQ. 
R  (5) 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 21-26-00-410-086 
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 824 (Ref. TASK 52-41-00-410-002). 
R  (3) Remove the access platform(s). 
R  Subtask 21-26-00-942-083 
　
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