Installation of the Cabin Air Intake Filter-Assembly

TASK 28-28-39-400-002-A
Installation of the Cabin Air Intake Filter-Assembly

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

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: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

ZONE: 150
FIN: 183QM ** 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	Torque wrench: range to between 0.06 and 0.055 m.daN (5.31 and 4.87 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
152DW, 826

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	PACKING	AIPC 28-28-84-05-550

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 25-55-11-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59
TASK 25-55-11-400-003-A	Installation of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-11-27-000-003-A	Removal of the Additional Center Tank No.2 (ACT AFT2)
TASK 28-11-27-400-003-A	Installation of the Additional Center Tank No.2 (ACT AFT2)
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Cabin Air-Intake Filter-Assembly

3. Job Set-up
Subtask 28-28-39-860-055-C ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration

Cabin Air-Intake Filter-Assembly ** ON A/C NOT FOR ALL

(1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(3) Make sure that the WARNING NOTICE(S) are on control panels that follow, to tell persons not to operate the refuel/defuel system:

Refuel/defuel control panels 800VU and 801VU
Fuel control panel 40VU
Additional Center Tank (ACT) control panel 28VU.

(4) Make sure that the ACCESS PLATFORM 2M (6 FT) is below aft cargo compartment door 826.
(5) Make sure that aft cargo compartment door 826 is open (Ref. AMM TASK 52-30-00-860-001).
(6) Make sure that CARGO COMPT LIGHT switch 8LU is set to the ON position.
(7) Make sure that the access panel (9) is opened or the ACT AFT2 and sidewall panel 152DW are removed (Ref. AMM TASK 28-11-27-000-003). (Ref. AMM TASK 25-55-11-000-003).

Subtask 28-28-39-865-056-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	FUEL/ACT AIR SOV/MAN/SPLY	64QH	J20
121VU	FUEL/ACT AIR SOV/AUTO/SPLY	63QH	J19
121VU	FUEL/ACT XFR VLV/MOT2	66QH	J18
121VU	FUEL/ACT XFR VLV/MOT1	65QH	J17
121VU	FUEL/INLET VLV MOT2 AUTO SP AFT 2	44QH2	K16
121VU	FUEL/INLET VLV/MOT1/AFT 2	84QH	L29
121VU	FUEL/HI/LVL/SPLY	1QJ	L24
121VU	FUEL/RFL/DFL/SPLY	2QU	L23
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L22
121VU	FUEL/ACT VENT VLV/MAN/SPLY	62QH	L21
121VU	FUEL/ACT VENT VLV/AUTO/SPLY	61QH	L20
121VU	FUEL/INLET VLV MAN CTL SPLY AFT 2	81QH	L16
121VU	FUEL/ACT/FUEL PUMP/SPLY	25QH	Q29

4. Procedure
Subtask 28-28-39-420-052-B ** ON A/C NOT FOR ALL

A. Installation of the Air Filter Assembly
(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Make sure that the parts retained from the removed component are clean and in the correct condition.
(5) Install the new AIPC 28-28-84-05-550 PACKING (4) on the union (3).
(6) Connect the union (3) to the air filter assembly (7) and tighten it.
(7) Put the air filter assembly (7) in its installation position.
(8) Install the nuts (5).
(9) Loosely install the nut (2) on the union (3).

CAUTION: USE A SECOND WRENCH TO HOLD THE FITTINGS WHEN YOU LOOSEN/TIGHTEN THE TUBE COUPLING NUTS. THIS PREVENTS DAMAGE TO THE TUBES.

(10) Tighten the nut (2).
(11) Bonding of the equipment:
(a) Prepare equipment for electrical bonding (Ref. AMM TASK 20-28-00-912-802).
(b) Install the nut (6).
(c) Apply surface protection on the nut (6) (Ref. AMM TASK 20-28-00-912-802).

5. Close-up
Subtask 28-28-39-865-057-A ** ON A/C NOT FOR ALL

A. 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
121VU	FUEL/ACT AIR SOV/MAN/SPLY	64QH	J20
121VU	FUEL/ACT AIR SOV/AUTO/SPLY	63QH	J19
121VU	FUEL/ACT XFR VLV/MOT2	66QH	J18
121VU	FUEL/ACT XFR VLV/MOT1	65QH	J17
121VU	FUEL/INLET VLV MOT2 AUTO SP AFT 2	44QH2	K16
121VU	FUEL/INLET VLV/MOT1/AFT 2	84QH	L29
121VU	FUEL/HI/LVL/SPLY	1QJ	L24
121VU	FUEL/RFL/DFL/SPLY	2QU	L23
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L22
121VU	FUEL/ACT VENT VLV/MAN/SPLY	62QH	L21
121VU	FUEL/ACT VENT VLV/AUTO/SPLY	61QH	L20
121VU	FUEL/INLET VLV MAN CTL SPLY AFT 2	81QH	L16
121VU	FUEL/ACT/FUEL PUMP/SPLY	25QH	Q29

Subtask 28-28-39-410-054-C ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Do step (a) or (b) as applicable:
(a) Close the access panel (9):
1 Install the access panel (9) and the studs (8) on sidewall panel 152DW.
2 TORQUE the studs (8) to between 0.06 and 0.055 m.daN (5.31 and 4.87 lbf.in )

.
(b) Install sidewall panel 152DW and the ACT AFT2 (Ref. AMM TASK 25-55-11-400-003) (Ref. AMM TASK 28-11-27-400-003).
(3) Set CARGO COMPT LIGHT switch 8LU to the OFF position.
(4) Close aft cargo compartment door 826 (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).

Subtask 28-28-39-860-060-A ** ON A/C NOT FOR ALL

C. Put the aircraft back to its initial configuration.
(1) On refuel/defuel control panels 801VU and 800VU, on fuel control panel 40VU and on ACT control panel 28VU:
(a) Remove the WARNING NOTICE(S).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:17:57 UTC