Removal of the Filter Assembly

TASK 21-26-43-000-007-A
Removal of the Filter Assembly

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.

1. Reason for the Job
Self explanatory
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	1	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 21-26-43-600-018-A	Servicing of the Demister Filter
TASK 21-26-43-600-019-A	Servicing of the Filter Cartridge
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
Filter Assembly (2081HM, 2082HM, 2083HM) ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 21-26-43-862-115-A ** ON A/C NOT FOR ALL

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

Subtask 21-26-43-861-120-A ** ON A/C NOT FOR ALL

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

Subtask 21-26-43-865-131-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 21-26-43-010-097-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the avionics-compartment aft door 824.
(2) Open the access door 824.

4. Procedure
Subtask 21-26-43-020-084-A ** ON A/C NOT FOR ALL

A. Removal of the Demister Filter and Filter Cartridge
(1) Remove the demister filter (Ref. AMM TASK 21-26-43-600-018).
(2) Remove the filter cartridge (Ref. AMM TASK 21-26-43-600-019).

NOTE: Close the door and lock the four elastic-fastener devices for the removal of the body.

Subtask 21-26-43-910-055-A ** ON A/C NOT FOR ALL

B. The body filter weighs approximately 4.6 kg (10.14 lb). Make sure that you support it correctly.

Subtask 21-26-43-020-085-A ** ON A/C NOT FOR ALL

C. Removal of the Filter Assembly
(1) Remove the clamps (1).
(2) Move the flexible sleeve (14) on the duct (15) to disengage the filter body (4).
(3) Remove the clamp (9).
(4) Release the drain hose (8).
(5) Remove the nuts (7) and screws (10) while you hold the equipped flange (12).
(6) Remove the nuts (5) and the screws (2).
(7) Remove the filter body (4).
(8) Remove the seal (11) and discard it.
(9) Put PLUG - BLANKING on the disconnected line ends.

[Rev.10 from 2021] 2026.04.02 06:11:06 UTC