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

TASK 36-11-00-790-002-A
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: 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	AR	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
471AL, 471AR, 481AL, 481AR
414FR, 423FL

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 27-00-00-080-002-A	Removal of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 36-22-00-790-001-A	Leak Check on all the Bleed Air Ducts and the Packs Components
TASK 49-00-00-860-005-A	APU Start by External Power
TASK 49-00-00-860-005-A-01	APU Start by Batteries
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
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 54-53-11-000-002-A	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-A	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
Combo Seals of the Pylon Duct Sleeves ** ON A/C NOT FOR ALL
Combo Seals of the Pylon Duct Sleeves ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 36-11-00-861-078-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-00-941-092-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that engine 1 and 2 shutdown occurred for a minimum of 5 minutes before you do this procedure.
(2) In the cockpit, on ENG panel 115VU:

Put a WARNING NOTICE(S) to tell persons not to start engine 1 and 2.

(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 (Ref. AMM TASK 27-00-00-480-002)
Put the WARNING NOTICE(S) on the flap and slat control lever to tell persons not to operate the flap and slat controls.

(4) In the cockpit, on the ENG section of maintenance panel 50VU:

Make sure that the ON legend of the ENG/FADEC GND PWR 1 and 2 pushbutton switches are off
Put the WARNING NOTICE(S) to tell persons not to energize FADEC 1 and 2.

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

Subtask 36-11-00-865-076-A ** ON A/C NOT FOR ALL

C. 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 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20

Subtask 36-11-00-860-066-A ** ON A/C NOT FOR ALL

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

The ENG 1 BLEED and ENG 2 BLEED pushbutton switches are released (OFF legends are on)
The PACK 1 and PACK 2 pushbutton switches are released (OFF legends are on)
The PACK FLOW selector switch is set to LO
The X BLEED selector switch is set to AUTO (the BLEED page shows that the CROSSBLEED valve is closed)
The APU BLEED pushbutton switch is released (the ON legend is off) (the BLEED page shows that the APU BLEED valve is 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 36-11-00-860-066-B ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) On AIR COND panel 30VU:

Make sure that the ENG 1 BLEED and ENG 2 BLEED pushbutton switches are released (the OFF legends are on)
Make sure that the PACK 1 and PACK 2 pushbutton switches are released (the OFF legends are on)
Make sure that the ECON FLOW pushbutton switch is pushed (the ON legend is on)
Make sure that the X BLEED selector switch is set to AUTO (the BLEED page shows that the CROSSBLEED valve is closed)
Make sure that the APU BLEED pushbutton switch is released (the ON legend is off) (the BLEED page shows that the APU BLEED valve is closed).

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

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

Subtask 36-11-00-010-078-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the related pylon access panel.
(2) Remove the access panels that follow:
(a) For the left pylon:
1 414FR (Ref. AMM TASK 54-53-11-000-002).
(b) For the right pylon:
1 423FL (Ref. AMM TASK 54-53-11-000-002).

Subtask 36-11-00-010-078-C ** ON A/C NOT FOR ALL

E. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the related pylon access panel.
(2) Remove the access panels that follow:
(a) For the left pylon:
1 471AL and 471AR (Ref. AMM TASK 54-53-11-000-002).
(b) For the right pylon:
1 481AL and 481AR (Ref. AMM TASK 54-53-11-000-002).

4. Procedure
Subtask 36-11-00-790-051-A ** ON A/C NOT FOR ALL

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

ACTION	RESULT
1.Start the APU to pressurize the pneumatic system: GTCP 36-300 (Ref. AMM D/O 49-00-00-86) or APS 3200 (Ref. AMM TASK 49-00-00-860-005) or 131-9(A) (Ref. AMM TASK 49-00-00-860-008). A.After the APU starts, wait for a minimum of 3 minutes of warm up period before you select the APU BLEED.
2.On the ECAM control panel: Push the BLEED key	On the lower ECAM Display Unit (DU), the BLEED page comes into view.
3.On the BLEED page: Make sure that the PRV (4001HA) are shown closed.
4.On AIR COND panel 30VU: Push the APU BLEED pushbutton switch.	The ON legend of the APU BLEED pushbutton switch goes on.
	On the BLEED page of the lower ECAM DU: The APU bleed valve is shown open (as a vertical green line).
5.Make sure that there are no leaks at the combo seals of the pylon duct sleeves (1) (Ref. AMM TASK 36-22-00-790-001).

5. Close-up
Subtask 36-11-00-860-067-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the AIR COND panel 30VU, release the APU BLEED pushbutton switch (the ON legend comes off).
(2) Stop the APU:

GTCP 36-300 (Ref. AMM D/O 49-00-00-86)
or
APS 3200 (Ref. AMM TASK 49-00-00-860-006)
or
131-9(A) (Ref. AMM TASK 49-00-00-860-009).

(3) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).

Subtask 36-11-00-410-077-A ** 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) Install the access panels that follow:
(a) For the left pylon:
1 414FR (Ref. AMM TASK 54-53-11-400-002).
(b) For the right pylon:
1 423FL (Ref. AMM TASK 54-53-11-400-002).
(3) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap and slat control lever (Ref. AMM TASK 27-00-00-080-002).
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

Subtask 36-11-00-410-077-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) Install the access panels that follow:
(a) For the left pylon:
1 471AL and 471AR (Ref. AMM TASK 54-53-11-400-002).
(b) For the right pylon:
1 481AL and 481AR (Ref. AMM TASK 54-53-11-400-002).
(3) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap and slat control lever (Ref. AMM TASK 27-00-00-080-002).
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

Subtask 36-11-00-862-074-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:06:54 UTC