W DOC AIRBUS | AMM A320F

Installation of the Starter Valve Elbow-Duct and the Precooler Exchanger Tee-Duct in the Pylon

TASK 36-11-49-400-821-A
Installation of the Starter Valve Elbow-Duct and the Precooler Exchanger Tee-Duct in the Pylon

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
CAUTION: USE A SECOND WRENCH TO APPLY COUNTER TORQUE TO THE UNION ON THE VALVE WHEN YOU CONNECT THE HP SENSE TUBE.
ZONE: 453
ZONE: 463
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 4M (13 FT)-ADJUSTABLE
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.9 and 0.78 m.daN (79.65 and 69.03 lbf.in ) T
No specific
Torque wrench: range to between 1.35 and 1.24 m.daN (119.47 and 109.73 lbf.in ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
453
HOT SECTION
463
HOT SECTION
413AL, 413BL, 423AL, 423BL
411AT, 413AR, 413BR, 421AT, 423AR, 423BR
411AL, 414AR, 414BR, 421AL, 424AR, 424BR
 C. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
13
SEAL
AIPC 36-11-06-02-040
 D. 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 36-12-00-860-001-A
Pressurization of the Bleed System with the APU
TASK 36-12-00-860-002-A
Pressurization of the Bleed System through the HP Ground Connector
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 49-00-00-860-009-A
APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01
APU Shutdown by Batteries (131-9(A))
F Starter Valve Elbow-Duct and Precooler Exchanger Tee-Duct in the Pylon
3. Job Set-up
Subtask 36-11-49-860-120-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 control-panel 30VU:
     (a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (OFF legend on).
     (b) Make sure that the APU BLEED pushbutton-switch is released (ON legend off).
     (c) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate the pneumatic system.
   (4) In the cockpit, on ENG control-panel 115VU:
     (a) Make sure that the WARNING NOTICE(S) is(are) 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(are) 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(are) in position to tell persons not to energize FADEC 1(2).
   (7) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the engine.
   (8) Make sure that these access panels are removed:
     (a) For the left pylon: 411AL 413AL 413BL 414AR 414BR
     (b) For the right pylon: 421AL 423AL 423BL 424AR 424BR.
Subtask 36-11-49-860-120-B ** 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 control-panel 30VU:
     (a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (OFF legend on).
     (b) Make sure that the APU BLEED pushbutton-switch is released (ON legend off).
     (c) Make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate the pneumatic system.
   (4) In the cockpit, on ENG control-panel 115VU:
     (a) Make sure that the WARNING NOTICE(S) is(are) 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(are) 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(are) in position to tell persons not to energize FADEC 1(2).
   (7) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position below the engine.
   (8) Make sure that these access panels are removed:
     (a) For the left pylon: 411AT 413AL 413BL 413AR 413BR
     (b) For the right pylon: 421AT 423AL 423BL 423AR 423BR.
4. Procedure
Subtask 36-11-49-420-135-A ** ON A/C NOT FOR ALL
A. Installation of the Starter Valve Elbow-Duct and the Precooler Exchanger Tee-Duct in the Pylon
   (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) Clean the component interfaces and the adjacent area.
   (4) Do an inspection of the component interfaces and the adjacent area.
   (5) Remove the PLUG-BLANKING from each disconnected line end.
   (6) Install the starter valve elbow-duct as follows:
     (a) Put a new AIPC 36-11-06-02-040 SEAL (13) in position on the duct (11).
     (b) Put the duct (11) and the support (10) in position in the pylon.
NOTE: The arrow that shows the direction of the air flow points down.
CAUTION: MAKE SURE THAT THE SCREWS OF THE ATTACHMENT CLAMPS ON THE OVERPRESSURE VALVE ARE IN THE CORRECT POSITION. IF NOT, THE SCREWS CAN CAUSE DAMAGE TO THE FIREWALL OF THE THRUST REVERSER COWL.
     (c) Install the clamp (12) on the duct (11) but do not fully tighten it.
     (d) Install the bolts (8) and the washers (9) in the support (10) and tighten the bolts (8).
   (7) Install the precooler exchanger tee-duct as follows:
     (a) Put the duct (1) in position in the pylon.
NOTE: The arrow that shows the direction of the air flow points up.
     (b) Install the clamps.
CAUTION: MAKE SURE THAT THE SCREWS OF THE ATTACHMENT CLAMPS ON THE OVERPRESSURE VALVE ARE IN THE CORRECT POSITION. IF NOT, THE SCREWS CAN CAUSE DAMAGE TO THE FIREWALL OF THE THRUST REVERSER COWL.
       1 Put the clamps (5), (6) and (7) in position in the duct (1).
       2 TORQUE the clamp (5) to between 1.35 and 1.24 m.daN (119.47 and 109.73 lbf.in ) T, and the clamps (6), (7) and (12) to between 0.9 and 0.78 m.daN (79.65 and 69.03 lbf.in ) T.
     (c) Install the screws (4) and the washers (3) in the support (2) and tighten the screws (4).
Subtask 36-11-49-720-096-A ** ON A/C NOT FOR ALL
B. Do this test:
   (1) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-002) or with the APU (Ref. AMM TASK 36-12-00-860-001).
   (2) On the AIR COND control-panel 30VU, set the X BLEED selector to OPEN.
   (3) If you pressurize the bleed system through the HP ground connector, the supplied pressure 30 psi (2.07 bar) must be stable.
   (4) Make sure that there are no leaks at the connections of the ducts on the related engine.
5. Close-up
Subtask 36-11-49-410-177-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) Install these access panels:
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
Subtask 36-11-49-410-177-B ** 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) Install these access panels:
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
Subtask 36-11-49-862-107-A ** ON A/C NOT FOR ALL
B. 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 12:38:37 UTC
"Aviabrain" 2025