Subtask 21-26-43-865-121
 C. Open, safety and tag this(these) circuit breaker(s):
R  -------------------------------------------------------------------------------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  **ON A/C 301-399, 
R  123VU AVNCS VENT/EXTC/FAN  2HQ  AC04 
R  **ON A/C 301-399, 401-499, 
R  123VU AVNCS VENT/BLOWER/FAN  1HQ  AD10 
R  **ON A/C 401-499, 
R  123VU AVNCS VENT/EXTC/FAN  2HQ  AE02 
R  **ON A/C 301-399, 401-499,
 Subtask 21-26-43-010-095
 D. Get Access
 (1) Put the access platform in position below the avionics-compartment aft door 824.
 (2) Open the access door 824. 

R 1EFF : 301-399, 401-499, 1 21-26-43Page 413 1 1 Config-2 Aug 01/05 1 1 1CES 1

 4. Procedure
_________
 (Ref. Fig. 403/TASK 21-26-43-991-032) Subtask 21-26-43-020-082
 A. Removal of the Demister Filter and the Filter Cartridge
 (1)
 Remove the demister filter (Ref. TASK 21-26-43-600-016).

 (2)
 Remove the filter cartridge (Ref. TASK 21-26-43-600-017). NOTE : Make sure that the door is closed for the removal of the

____
 filter housing.

 Subtask 21-26-43-910-054
 B. The filter housing weighs approximately 4.6 kg (10.14 lb). Make sure that you support it correctly.
 Subtask 21-26-43-020-083
 C. Removal of the Filter Assembly
 (1)
 Remove the clamps (12) and (13).

 (2)
 Move the flexible sleeves (1) and (10) on the ducts (11) and (14) to disengage the filter housing (4).

 (3)
 Remove the clamp (8).

 (4)
 Release the drain hose (9).

 (5)
 Remove the clamp (6).

 (6)
 Remove and discard the O-ring (7).

 (7)
 Remove the nuts (5) and the screws (2).

 (8)
 Remove the filter housing (4).

 (9)
 Put PLUG - BLANKING on the disconnected line ends.

R 1EFF : 301-399, 401-499, 1 21-26-43Page 414 1 1 Config-2 Aug 01/05 1 1 1CES 1

 Filter Assembly
 Figure 403/TASK 21-26-43-991-032

R 1EFF : 301-399, 401-499, 1 21-26-43Page 415 1 1 Config-2 Aug 01/05 1 1 1CES 1 TASK 21-26-43-400-006

 Installation of the Filter Assembly (2081HM, 2082HM, 2083HM)
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 1.6 m (5 ft. 3 in.)
 B. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
O-ring 21-26-01 03N-050
 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-26-43-600-016 Discard Demister Filter 21-26-43-600-017 Discard Filter Cartridge 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 21-26-43-991-032 Fig. 403
R 1EFF : 301-399, 401-499, 1 21-26-43Page 416 1 1 Config-2 Aug 01/05 1 1 1CES 1

 3. Job Set-up__________
 Subtask 21-26-43-860-059
 A. Aircraft Maintenance Configuration
 (1) Make sure that the aircraft electrical circuits are de-energized (Ref. TASK 24-41-00-862-002).
 (2) Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001).
 Subtask 21-26-43-865-122
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
R  -------------------------------------------------------------------------------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 
　
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