Removal of the Filter Assembly

TASK 47-10-41-000-001-A
Removal of the Filter Assembly

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:

ON THE THS OR IN THE REAR FUSELAGE
ON TOP OF THE WINGS OR PYLONS.

WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

ZONE: 191
ZONE: 192
FIN: 2YM ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	4	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191	AIR CONDITIONING COMPT AND FAIRINGS
192	AIR CONDITIONING COMPT AND FAIRINGS
191BB

C. 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 53-35-13-000-002-A	Removal of the Quick-Release Access Panels from the Belly Fairing Structure
Filter Assembly ** ON A/C NOT FOR ALL
Filter Assembly ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 47-10-41-860-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 47-10-41-865-053-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	N28
** ON A/C NOT FOR ALL
121VU	IGGS/CTRL	7YA	P28
** ON A/C NOT FOR ALL
122VU	CSAS / CTRL	1HW	U17

Subtask 47-10-41-010-053-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an access platform ACCESS PLATFORM 2M (6 FT) in position at zones 191 and 192.
(2) Remove the quick-release access panel (access panel) 191BB (Ref. AMM TASK 53-35-13-000-002).
(3) If the thermal insulation is installed on the filter assembly, remove it.

Subtask 47-10-41-010-053-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an access platform ACCESS PLATFORM 2M (6 FT) in position at zones 191 and 192.
(2) Remove the quick-release access panel (access panel) 191BB (Ref. AMM TASK 53-35-13-000-002).

4. Procedure
Subtask 47-10-41-020-051-B ** ON A/C NOT FOR ALL

A. Removal of the Filter Assembly

WARNING: DO NOT GO INTO THE WORK AREA UNTIL A MINIMUM OF 5 MINUTES AFTER YOU REMOVE THE ACCESS PANEL. LET AIR FLOW THROUGH THE WORK AREA. AIR FROM THIS SYSTEM HAS A LOW OXYGEN CONTENT AND CAN CAUSE INJURY OR DEATH.

CAUTION: BE CAREFUL WHEN YOU TOUCH THIS ASSEMBLY. IT HAS PRECISION- TOLERANCE COMPONENTS WITH VERY POLISHED SURFACES. IF YOU ARE NOT CAREFUL, IT IS VERY EASY TO CAUSE DAMAGE TO THESE COMPONENTS (INTERNAL CONTAMINATION, EXTERNAL IMPACT DAMAGE).

CAUTION: REMOVE OR INSTALL PACKING SEALS CAREFULLY. DAMAGE TO SEALS OR SEALING SURFACES CAN CAUSE LEAKAGE AND CORROSION.

(1) Release and remove the coupling assembly (9):

NOTE: The clamp and the sleeve fit together to make one coupling assembly (9).

(a) Pull up the latch pawls of the clamp to remove and retain the clamp.
(b) Move the sleeve across the packing (8) to the inlet (7) of the filter assembly (filter) (6).

NOTE: Do not remove the sleeve until you remove the filter (6).

(2) Release and remove the coupling assembly (12):

NOTE: The clamp and the sleeve fit together to make one coupling assembly (12).

(a) Pull up the latch pawls of the clamp to remove and retain the clamp.
(b) Move the sleeve across the packing (13) to the outlet (14) of the filter (6).
(3) Remove the screw (3), the washer (4) and the bonding strap (5).
(4) Support the filter (6) and remove the screws (1) and the washers (2).
(5) Carefully release and remove the filter (6).
(6) Remove and discard the packing (8), (10), (11) and (13).
(7) For the coupling assembly (9), remove and retain the sleeve, keep it with the clamp.
(8) For the coupling assembly (12), remove and retain the sleeve, keep it with the clamp.
(9) Put CAP - BLANKING on the inlet fitting (7), the outlet fitting (14), the isolation valve outlet and the IGGS pallet inlet.

[Rev.10 from 2021] 2026.04.02 06:26:17 UTC