(3)
 Put the assembly through the door into the body (10) and engage the bearing of the filter (13) into the housing.

 (4)
 Release the ring (12), close the door and lock the four
 elastic-fastener devices.

 5. Close-up
________ Subtask 21-26-43-410-080
 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).

R 1EFF : 002-049, 051-099, 101-105, 1 21-26-43Page 317 1 1 Config-1 May 01/05 1 1 1CES 1 Subtask 21-26-43-865-100

 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1HQ, 2HQ, 3HQ, 5HQ, 6HQ
 Subtask 21-26-43-861-097
 C. Energize the aircraft eletrical circuits (Ref. TASK 24-41-00-861-002). Subtask 21-26-43-862-096
 D. De-energize the ground service network (Ref. TASK 24-42-00-862-001).
R 1EFF : 002-049, 051-099, 101-105, 1 21-26-43Page 318 1 1 Config-1 May 01/05 1 1 1CES 1

R  **ON A/C 001-049, 101-105, 301-399, 401-499, 
R  Post SB  21-1087 For A/C 001-049,101-105,
 FILTER ASSY - AVIONICS VENTILATION - SERVICING______________________________________________ 
R  **ON A/C 301-399, 401-499,
 TASK 21-26-43-600-016
 Discard Demister Filter
 CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE THE_______ AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
 1. Reason for the Job__________________
 Refer to the MPD TASK: 212600-11
 2. Job Set-up Information______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific No specific No specific  circuit breaker(s) safety clip(s)demister filteraccess platform 1.6 m (5 ft. 3 in.) 

R 1EFF : 001-049, 101-105, 301-399, 401-499, 1 21-26-43Page 301 1 1 Config-2 Aug 01/05 1 1 1CES 1

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from
 the External Power 52-41-00-410-002 Close the Avionics Compartment Doors after Access 21-26-43-991-028 Fig. 301
 3. Job Set-up
__________
 Subtask 21-26-43-862-105
 A. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
 Subtask 21-26-43-861-110
 B. Energize the ground service network (Ref. TASK 24-42-00-861-001).
 Subtask 21-26-43-865-113
 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05 122VU AIR COND/AVNCS/VENT/MONG 3HQ Y17
R
R **ON A/C 301-399,
R 123VU AVNCS VENT/EXTC/FAN 2HQ AC04
R 1EFF : 301-399, 401-499, 1 21-26-43Page 302 1 1 Config-2 Aug 01/05 1 1 1CES 1

R  -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------**ON A/C 301-399, 401-499, 
R R  123VU AVNCS VENT/BLOWER/FAN **ON A/C 401-499,  1HQ  AD10 
R R  123VU AVNCS VENT/EXTC/FAN **ON A/C 301-399, 401-499, 2HQ  AE02 
Subtask 21-26-43-010-091
 D. Get Access
 (1) Put the access platform in position at the access door 824. (2) Open the access door 824. 4. Procedure_________
 (Ref. Fig. 301/TASK 21-26-43-991-028) Subtask 21-26-43-020-078
 A. Removal of the Demister Filter
 (1) Turn the seven door fasteners (3) of the filter housing (2) and open the door.
 (2) Remove the demister filter (1) and discard it. Subtask 21-26-43-210-078
 B. Do an inspection of the component interface and/or the adjacent area. 
　
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