W DOC AIRBUS | AMM A320F

Installation of the Lower Bleed Air-Duct

TASK 36-11-49-400-012-B
Installation of the Lower Bleed Air-Duct

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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)
No specific
AR
FOIL - ALUMINUM
No specific
AR
WARNING NOTICE(S)
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.V01-076)
Methyl Ethyl Ketone, Technical grade
(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
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
42
SEAL
AIPC 36-11-49-80-100
44
SEAL
AIPC 36-11-51-80-020
 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 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 36-11-49-000-012-B
Removal of the Lower Bleed-Air Duct
TASK 36-11-49-820-010-A
Rig the Bleed Air Ducts
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 71-00-00-710-017-B
Ground Test Requirements after Power Plant Module/Component Repair or Replacement Procedures
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
F Lower Bleed Air Duct
3. Job Set-up
Subtask 36-11-49-860-057-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) shutdown occurred for a minimum of 5 minutes before you do this procedure.
   (3) On AIR COND panel 30VU:
  • Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on)
  • Make sure that the APU BLEED pushbutton switch is released (the ON legend is off)
  • Make sure that the WARNING NOTICE(S) to tell persons not to operate the pneumatic system is in position.
   (4) On ENG panel 115VU:
  • Make sure that the WARNING NOTICE(S) to tell persons not to start engine 1(2) is in position.
   (5) On the HP ground connector:
  • Make sure that the WARNING NOTICE(S) to tell persons not to pressurize the pneumatic system is in position.
   (6) On the ENG section of maintenance panel 50VU:
  • Make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off
  • Make sure that the WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2) is in position.
   (7) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position below the engine.
Subtask 36-11-49-010-092-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 thrust reverser doors are open (Ref. AMM TASK 78-32-00-010-010):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 36-11-49-040-080-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).
Subtask 36-11-49-865-095-A ** ON A/C NOT FOR ALL
D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
4. Procedure
Subtask 36-11-49-110-057-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:
   (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 V01-076Methyl Ethyl Ketone, Technical grade 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.
Subtask 36-11-49-210-068-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 36-11-49-420-070-A ** ON A/C NOT FOR ALL
C. Installation of the Lower Bleed Air Duct
   (1) Remove the PLUG-BLANKING from each disconnected line end.
   (2) Examine the replacement parts and their interfaces. Make sure that they have no damage.
   (3) Install the lower duct. Make sure that the parts are installed in the positions noted on removal (Ref. AMM TASK 36-11-49-000-012).
F Lower Bleed Air Duct ** ON A/C NOT FOR ALL
     (a) Install AIPC 36-11-49-80-100 SEAL (42) and AIPC 36-11-51-80-020 SEAL (44).
     (b) Put the duct (45) on the engine, in the correct position for installation.
     (c) Install the couplings (41) and (43).
     (d) Tighten the couplings sufficient to hold the duct in position.
Subtask 36-11-49-820-055-A ** ON A/C NOT FOR ALL
D. Rig the cabin bleed air ducts (Ref. AMM TASK 36-11-49-820-010).
Subtask 36-11-49-480-065-A ** ON A/C NOT FOR ALL
E. Prepare the Leak Test
   (1) There are two possible procedures to find the location of a pneumatic joint air-leak.
NOTE: Apply dry developer only on the connections of the pneumatic components that you removed. Do not apply dry developer on all of pneumatic components.
You can apply V06-032developer, dry around the pneumatic joints or you can install FOIL - ALUMINUM around the pneumatic joint locations.
Do the steps that follow to apply aluminum foil at 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 do not cause damage to the wrap.
     (d) Attach the foil wrap with lockwire (Material No.V02-147) at both sides of the pneumatic joint.
Subtask 36-11-49-410-066-A ** ON A/C NOT FOR ALL
F. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 36-11-49-440-058-A ** ON A/C NOT FOR ALL
G. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).
Subtask 36-11-49-865-096-A ** ON A/C NOT FOR ALL
H. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
122VUAIR BLEED/ENG 2/CTL3HA2Z23
122VUAIR BLEED/ENG 2/MONG2HA2Z22
Subtask 36-11-49-860-105-A ** ON A/C NOT FOR ALL
I. Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
Subtask 36-11-49-720-084-A ** ON A/C NOT FOR ALL
J. Do this Test
   (1) On the ECAM control panel 11VU, push the bleed key (on the lower ECAM DU, the BLEED page comes into view).
   (2) On the lower ECAM DU, on the BLEED page:
  • Make sure that the related HP bleed valve is shown closed.
   (3) Start the related engine with the automatic or 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.
   (4) On the AIR COND panel 30VU:
  • Push the ENG 1(2) BLEED pushbutton switch (the OFF legend goes off).
   (5) After 5 minutes, on the lower ECAM DU, on the BLEED page:
  • Make sure that the HP bleed valve is open.
   (6) Do the engine shutdown procedure (Ref. AMM TASK 71-00-00-710-018).
Subtask 36-11-49-040-132-A ** ON A/C NOT FOR ALL
K. Deactivation of the Thrust Reverser
WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
   (1) Do the deactivation of the Hydraulic Control Unit (HCU) of the thrust reverser (Ref. AMM TASK 78-30-00-040-012).
Subtask 36-11-49-010-178-A ** ON A/C NOT FOR ALL
L. Get Access
   (1) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 36-11-49-080-061-A ** ON A/C NOT FOR ALL
M. Make sure that there are no leaks at the junction of 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 test.
5. Close-up
Subtask 36-11-49-860-106-A ** ON A/C NOT FOR ALL
A. Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
Subtask 36-11-49-410-155-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) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 36-11-49-440-101-A ** ON A/C NOT FOR ALL
C. Do the activation of the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).
Subtask 36-11-49-410-081-A ** ON A/C NOT FOR ALL
D. 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 36-11-49-710-056-A ** ON A/C NOT FOR ALL
E. Do an operational test of the cabin bleed air system (Ref. AMM TASK 71-00-00-710-017) .
Subtask 36-11-49-862-066-A ** ON A/C NOT FOR ALL
F. 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 01:11:02 UTC
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