Discard Demister Filter Element and Filter Cartridge (LE BOZEC)

TASK 21-26-43-600-016-A
Discard Demister Filter Element and Filter Cartridge (LE BOZEC)

WARNING: PUT ON GLOVES, A COVERALL WITH A HOOD, GOGGLES AND A PARTICULATE RESPIRATOR BEFORE YOU TOUCH THE FILTER. THE FILTER REMOVES SMALL PARTICLES (SMOKE, DUST, LINT, FIBERS, POLLEN) AND INFECTIOUS MATERIALS (BACTERIA, VIRUSES, MOLD SPORES, FUNGI) FROM THE AIR. THESE MATERIALS CAN CAUSE ILLNESS.

WARNING: DO NOT LET THE FILTER TOUCH YOUR SKIN. DO NOT SHAKE OR HIT THE FILTER. DO NOT LET THE FILTER FALL. DO NOT USE COMPRESSED AIR TO CLEAN THE FILTER OR FILTER HOUSING. THIS CAN CAUSE THE INFECTIOUS MATERIAL TO BECOME AIRBORNE. DISCARD THE FILTER IN A PLASTIC DISPOSAL BAG. IF YOU DO NOT OBEY THESE INSTRUCTIONS, INFECTIOUS MATERIAL FROM THE FILTER CAN CAUSE ILLNESS.

WARNING: PUT ALL AIR FILTERS THAT YOU REMOVE FROM THE AIRCRAFT INTO PLASTIC DISPOSAL BAGS. AIR FILTERS CAN CONTAIN INFECTIOUS MATERIALS WHICH CAN CAUSE ILLNESS. OBEY AIRLINE POLICY AND LOCAL HEALTH DEPARTMENT AND LAW ENFORCEMENT REGULATIONS FOR DISPOSAL OF INFECTIOUS MATERIALS.

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.

ZONE: 127

1. Reason for the Job
Refer to the MPD TASK: 212600-11
DISCARD DEMISTER FILTER ELEMENT AND FILTER CARTRIDGE (LE BOZEC)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
824

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	FILTER CARTRIDGE	AIPC 21-26-43-02-060
1	DEMISTER FILTER	AIPC 21-26-43-02-070

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Demister Air Filter Element and Filter Cartridge (LE BOZEC)

3. Job Set-up
Subtask 21-26-43-862-121-A ** ON A/C NOT FOR ALL

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

Subtask 21-26-43-861-110-A ** ON A/C NOT FOR ALL

B. Energize the ground service network (Ref. AMM TASK 24-42-00-861-001).

Subtask 21-26-43-865-134-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/AVNCS VENT/CTL	6HQ	D06
49VU	AIR COND/AVNCS VENT/CTL	5HQ	D05
122VU	AIR COND/AVNCS/VENT/MONG	3HQ	Y17
123VU	AVNCS VENT/EXTC/FAN	2HQ	AC04
123VU	AVNCS VENT/BLOWER/FAN	1HQ	AD10

Subtask 21-26-43-010-091-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824 (Ref. AMM TASK 52-41-00-010-002).

4. Procedure
Subtask 21-26-43-020-089-E ** ON A/C NOT FOR ALL

A. Removal of the Filter Cartridge
(1) Turn the door fasteners (3) of the filter housing (2) and open the door.
(2) Push the cartridge clamp (5) and remove the filter cartridge (4).
(3) Discard the filter cartridge (4).

Subtask 21-26-43-020-078-A ** ON A/C NOT FOR ALL

B. Removal of the Demister Filter
(1) Turn the 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-A ** ON A/C NOT FOR ALL

C. Clean the component interfaces and the adjacent area.

Subtask 21-26-43-420-087-D ** ON A/C NOT FOR ALL

D. Installation of the Filter Cartridge
(1) Put a new AIPC 21-26-43-02-060 FILTER CARTRIDGE (4) in position in the filter housing (2).
(2) Pull the cartridge clamp (5) to prevent movement of the filter cartridge (4).
(3) Turn and safety the door fasteners (3) of the filter housing (2) to close the door.

Subtask 21-26-43-420-079-A ** ON A/C NOT FOR ALL

E. Installation of the Demister Filter
(1) Put a new AIPC 21-26-43-02-070 DEMISTER FILTER (1) in position in the filter housing (2).
(2) Make sure that the demister filter (1) is correctly installed in the filter housing (2).
(3) Turn and safety the door fasteners (3) of the filter housing (2) to close the door.

5. Close-up
Subtask 21-26-43-410-086-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

Subtask 21-26-43-865-135-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/AVNCS VENT/CTL	6HQ	D06
49VU	AIR COND/AVNCS VENT/CTL	5HQ	D05
122VU	AIR COND/AVNCS/VENT/MONG	3HQ	Y17
123VU	AVNCS VENT/EXTC/FAN	2HQ	AC04
123VU	AVNCS VENT/BLOWER/FAN	1HQ	AD10

Subtask 21-26-43-861-127-A ** ON A/C NOT FOR ALL

C. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 21-26-43-862-106-A ** ON A/C NOT FOR ALL

D. De-energize the ground service network (Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:03:12 UTC