Installation of the Intermediate Pressure (IP) Bleed Check Valve

TASK 36-11-41-400-010-A
Installation of the Intermediate Pressure (IP) Bleed Check Valve

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 453
FIN: 7110HM ** 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	AR	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	FOIL - ALUMINUM
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 85 and 75 lbf.in (0.96 and 0.85 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.V01-012)	Cleaning fluid
(Material No.V02-147)	lockwire
(Material No.V06-032)	developer, dry
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
453	HOT SECTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	SEAL	AIPC 36-11-41-80-030
4	SEAL	AIPC 36-11-41-80-030

E. 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 24-41-00-862-002-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 36-11-41-000-010-A	Removal of the Intermediate Pressure (IP) Bleed Check-Valve
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 70-23-11-911-011-A	Check for Re-use of Self-Locking Fasteners
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-00-00-710-018-A	Discontinued Start, Restart and Shutdown Procedures
TASK 71-00-00-710-043-A	Normal Engine Automatic-Start Procedure
TASK 71-00-00-710-047-A	Normal Engine Manual-Start Procedure
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
IP Bleed Check Valve

3. Job Set-up
Subtask 36-11-41-860-057-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that engine 1(2) is shutdown for a minimum of 5 minutes before you do this procedure.
(3) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (the OFF legend is on).
(b) Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
(c) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.
(4) In the cockpit, on ENG panel 115VU:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to start engine 1(2).
(5) On the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.
(6) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton-switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(7) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position below the engine.

Subtask 36-11-41-010-062-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the left thrust reverser doors is open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL

Subtask 36-11-41-040-056-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

4. Procedure
Subtask 36-11-41-110-051-A ** ON A/C NOT FOR ALL

A. Clean the Replacement Parts and their Interfaces
(1) If you use the APU to energize the electrical circuits, stop the APU:

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

(2) In the cockpit, on the SD bleed page:
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.

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

WARNING: DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

(3) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) and clean the replacement parts and their interfaces.
(4) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) and remove the dirty cleaning fluid from the parts while they are wet.
(5) Before installation, clean the surface of the seals (3) and (4) with a Textile-Lint free Cotton - (Material No.14SBA1) moistened with Cleaning fluid (Material No.V01-012) .

Subtask 36-11-41-210-054-A ** ON A/C NOT FOR ALL

B. Visual Inspection of the Seals
(1) Examine the seals for signs of oxidation, carbon flakes and foreign materials on the face that touches the duct flanges.
(2) Examine the surface and the edges of the seals for dents, pitting, cracks, scratches and distortion.
(3) If you cannot remove the foreign materials from the seals or if you find damage or distortion, replace the seals.

Subtask 36-11-41-420-052-A ** ON A/C NOT FOR ALL

C. Installation of the IP Bleed Check-Valve

CAUTION: MAKE SURE THE CHECK VALVE FLOW DIRECTION ARROW IS POINTED TO THE AIRCRAFT SYSTEM AND THE SLOT IN THE CHECK VALVE ENGAGES THE PIN ON THE DUCT. DAMAGE TO THE CHECK VALVE AND DUCTS WILL OCCUR IF THE VALVE IS NOT INSTALLED CORRECTLY.

(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Make sure that the nuts of the couplings (2) and (5) are in the correct condition (Ref. AMM TASK 70-23-11-911-011).
(3) Install the AIPC 36-11-41-80-030 SEAL (3) and the AIPC 36-11-41-80-030 SEAL (4).
(4) Install the check valve (7).

CAUTION: MAKE SURE THE THREADED PART OF THE COUPLING IS RADIALLY OUTBOARD OF THE ENGINE. DO NOT LET THE COUPLING TOUCH ENGINE COMPONENTS OR STRUCTURE. DAMAGE TO THE COMPONENTS OR STRUCTURE COULD OCCUR.

(5) Hold the check valve (7) in position as recorded during the removal procedure (Ref. AMM TASK 36-11-41-000-010). Install the couplings (2) and (5) and make sure that they will not touch the thrust-reverser cowl when it is closed.
(6) TORQUE the nuts to between 85 and 75 lbf.in (0.96 and 0.85 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

NOTE: Too much torque on the nuts of the IP bleed-check-valve clamp can cause air leakage and damage to the insulation of the thrust-reverser cowl.

Subtask 36-11-41-480-052-A ** ON A/C NOT FOR ALL

D. Preparation for the leak test
(1) There are two procedures to find the location of an air leak, at a pneumatic joint.

NOTE: Apply dry developer only on the connections of the removed pneumatic components. Do not apply dry developer on all the pneumatic components.

You can apply V06-032developer, dry around the pneumatic joints or you can install FOIL - ALUMINUM around the pneumatic joint locations.
Use the steps that follow to apply foil, aluminum to the pneumatic joint locations.
(a) Wind the foil wrap around the joint one time.
(b) Twist the seam of the foil wrap tight.
(c) Make the foil wrap as tight as possible on the tube but not rip the wrap.
(d) Attach the foil wrap with lockwire (Material No.V02-147) at both sides of the pneumatic joint.

Subtask 36-11-41-410-062-A ** ON A/C NOT FOR ALL

E. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-41-440-055-A ** ON A/C NOT FOR ALL

F. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 36-11-41-720-051-A ** ON A/C NOT FOR ALL

G. Do this Test
(1) Start the related engine with the automatic or the manual start procedure (Ref. AMM TASK 71-00-00-710-043) or (Ref. AMM TASK 71-00-00-710-047) and keep it at idle.

NOTE: The engine speed at idle does not open the IP bleed check-valve but is sufficient to do a leak check on the two sides of the valve.

(2) In the cockpit, on AIR COND panel 30VU:

Push the ENG 1(2) BLEED pushbutton-switch (OFF legend goes off).

(3) On the ECAM control panel, push the BLEED key (on the lower ECAM DU, the BLEED page comes into view).
(4) On the lower ECAM DU, on the BLEED page:

Make sure that the bleed system operates correctly.

(5) Do the engine shutdown procedure (Ref. AMM TASK 71-00-00-710-018).

Subtask 36-11-41-040-059-A ** ON A/C NOT FOR ALL

H. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

Subtask 36-11-41-010-066-A ** ON A/C NOT FOR ALL

I. Get Access
(1) Open the thrust reverser doors (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-41-080-052-A ** ON A/C NOT FOR ALL

J. Make sure that there are no leaks downstream at the junctions between the IP bleed valve and the duct on the related engine.

NOTE: There is a leak when the foil installed on the duct breaks or when it is too hot.
There is a leak when the leak air removes the dry developer from the junction.

(1) Remove the materials used to do the leak check.

5. Close-up
Subtask 36-11-41-410-053-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust reverser halve (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL.
(b) FOR [1000EM2] (ENGINE-2)
461AL.

Subtask 36-11-41-440-052-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 36-11-41-410-058-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

Subtask 36-11-41-862-051-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:09:06 UTC