Perform Leak Check on the Combo Seals on the Pylon Duct Sleeves (Downstream Precooler)

TASK 36-11-00-790-002-B
Perform Leak Check on the Combo Seals on the Pylon Duct Sleeves (Downstream Precooler)

WARNING: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:

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

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

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

ZONE: 210
ZONE: 410
ZONE: 420

1. Reason for the Job
Refer to the MPD TASK: 361100-06
PERFORM LEAK CHECK ON THE COMBO SEALS ON THE PYLON DUCT SLEEVES (DOWNSTREAM PRECOOLER)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
98D27803000000	2	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
811
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413ET
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423ET

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 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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 36-22-00-790-802-A	Leak Check on all the Bleed Air Ducts and the Packs Components
TASK 49-00-00-860-008-A	APU Start by External Power
TASK 49-00-00-860-008-A-01	APU Start by Batteries
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
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
Combo Seals of the Pylon Duct Sleeves (Downstream Precooler)
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors

3. Job Set-up
Subtask 36-11-00-861-163-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-00-941-155-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(2) On ENG panel 115VU:

Put a WARNING NOTICE(S) in position to tell persons not to start the engine(s).

(3) In the cockpit, on center pedestal panel 114VU:

Install a 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap and slat control lever
Put the WARNING NOTICE(S) on the flap and slat control lever to tell persons not to operate the flap and slat controls.

(4) On the ENG section of maintenance panel 50VU:

Make sure that the ENG FADEC GND PWR 1(2) pushbutton switch is released (the ON legend is off).
Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

(5) Do the EIS start procedure (ECAM system only) (Ref. AMM TASK 31-60-00-860-001).

Subtask 36-11-00-860-155-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) On AIR COND panel 30VU, make sure that:

The ENG 1 and ENG 2 BLEED pushbutton-switches are released (the OFF legends are on).
The PACK 1 and PACK 2 pushbutton-switches are released (the OFF legends are on).
The PACK FLOW selector switch is set to the LO position.
The X BLEED selector switch is set to the AUTO position (on the BLEED page, the CROSSBLEED valve is shown closed).
The APU BLEED pushbutton switch is released (the ON legend is off) (on the BLEED page, the APU BLEED valve is shown closed).

(2) On the ANTI ICE section of panel 25VU:

Make sure that the ANTI ICE WING pushbutton switch is released (the ON legend is off).

Subtask 36-11-00-010-202-A ** ON A/C NOT FOR ALL

D. Get access to the avionics compartment.

WARNING: MAKE SURE THAT THE FWD AVIONICS ACCESS DOOR 811 IS OPEN WITH A WARNING PLACARD ATTACHED TO IT. THE WARNING NOTICE MUST TELL PERSONS NOT TO CLOSE THE DOOR. THIS PREVENTS ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT.

(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the access door 811.
(2) Open access door 811 (Ref. AMM TASK 52-41-00-010-002).
(3) Put a WARNING NOTICE(S) to tell persons not to close door 811.

Subtask 36-11-00-865-161-A ** ON A/C NOT FOR ALL

E. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20

Subtask 36-11-00-010-199-A ** ON A/C NOT FOR ALL

F. Get access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Remove these access panels:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413ET (Ref. AMM TASK 54-53-11-000-804).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423ET (Ref. AMM TASK 54-53-11-000-804).
(3) Remove the insulation from the pylon duct sleeves.

4. Procedure
Subtask 36-11-00-790-057-A ** ON A/C NOT FOR ALL

A. Leak Check of the Combo Seals of the Pylon Duct Sleeves

ACTION	RESULT
1.Start the APU to pressurize the pneumatic system (Ref. AMM TASK 49-00-00-860-005). A.After the APU starts, Airbus recommends you to wait for a minimum of 3 minutes for the warm up period, before you select the APU BLEED.
2.On the ECAM control panel: Push the BLEED key.	In the cockpit, on the lower-ECAM Display Unit (DU): The BLEED page comes into view.
3.On the BLEED page: Make sure that the bleed valves are shown closed.
4.In the cockpit, on AIR COND panel 30VU: Push the APU BLEED pushbutton-switch.	In the cockpit, on AIR COND panel 30VU: The ON legend of the APU BLEED pushbutton-switch comes on.
	On the BLEED page of the lower ECAM DU: The APU bleed valve is shown open (vertical green line).
5.Make sure that there are no leaks at the combo seals of the pylon duct sleeves (Ref. AMM TASK 36-22-00-790-802).
6.In the cockpit, on AIR COND panel 30VU: Release the APU BLEED pushbutton-switch.	In the cockpit, on AIR COND panel 30VU: The ON legend of the APU BLEED pushbutton-switch goes off.
7.Stop the APU (Ref. AMM TASK 49-00-00-860-006).

5. Close-up
Subtask 36-11-00-410-189-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Install the insulation on the pylon duct sleeves.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install these panels:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413ET (Ref. AMM TASK 54-53-11-400-804).
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423ET (Ref. AMM TASK 54-53-11-400-804).

Subtask 36-11-00-410-192-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap and slat control lever.
(2) Close access door 811 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

Subtask 36-11-00-860-160-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Put the aircraft back to its initial configuration.
(3) Remove the WARNING NOTICE(S).

Subtask 36-11-00-862-144-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:07:32 UTC