DOC AIRBUS | AMM A320FInstallation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Bleed Differential Pressure-Transducer
TASK 36-11-49-400-828-A
Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Bleed Differential Pressure-Transducer
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 36-11-49-861-120-A ** ON A/C NOT FOR ALL
Subtask 36-11-49-420-144-A ** ON A/C NOT FOR ALL
Subtask 36-11-49-410-197-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:38:01 UTC
Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Bleed Differential Pressure-Transducer
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:
ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
CAUTION:
BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.
1. Reason for the JobSelf 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 | 1 | FOIL - ALUMINUM |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | WARNING NOTICE(S) |
| No specific | 1 | WATER - SOAPY SOLUTION |
| No specific | Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )  | |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| 98L12003001000 | AR | HARNESS,SAFETY |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14QEB1) | Wire-Locking Dia: 0.6 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 413 | UPPER FWD PYLON |
| 423 | UPPER FWD PYLON |
| 471 | PYLON LEADING EDGE |
| 481 | PYLON LEADING EDGE |
| 191DB | |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 413AL, 413AT, 413BL, 413CL, 413DL, 413ET | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 423AL, 423AT, 423BL, 423CL, 423ET, 481AL | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-00-00-481-002-A | Installation of the Wingrip |
| TASK 20-23-22-910-001-A | Marking of the Unions after Application of Standard or Specific Tightening Torque |
| 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 27-00-00-480-002-A | Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000) |
| TASK 36-11-18-400-801-A | Installation of the Bleed Differential Pressure-Transducer |
| TASK 36-12-00-860-802-A | Pressurization of the Bleed System with the APU |
| TASK 36-12-00-860-803-A | Pressurization of the Bleed System through the HP Ground Connector |
| 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 54-52-11-000-805-A | Removal of the Access Skin Panels |
| TASK 54-52-11-400-805-A | Installation of the Access Skin Panels |
| TASK 54-52-82-000-801-A | Removal of the Strips |
| TASK 54-52-82-400-801-A | Installation of the Strips |
| 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 |
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Bleed Differential Pressure-TransducerSubtask 36-11-49-861-120-A ** ON A/C NOT FOR ALL
A. 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).
Subtask 36-11-49-941-142-A ** ON A/C NOT FOR ALL B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On AIR COND 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 in position to tell persons not to operate the pneumatic system.
(3) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(4) On access door 191DB, 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.
(5) On FLAPS panel 114VU:
Subtask 36-11-49-865-217-A ** ON A/C NOT FOR ALL (1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On AIR COND 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 in position to tell persons not to operate the pneumatic system.
(3) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(4) On access door 191DB, 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.
(5) On FLAPS panel 114VU:
- Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
- Make sure that the WARNING NOTICE(S) is in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 36-11-49-010-251-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1) | |||
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2) | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
D. Get Access
(1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position at the pylon access panels.
(2) Make sure that these access panels are removed (Ref. AMM TASK 54-52-11-000-805) and (Ref. AMM TASK 54-53-11-000-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AL 413BL 413CL 413DL 413AT 413ET
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AL 423BL 423CL 423AT 423ET 481AL
Subtask 36-11-49-010-266-A ** ON A/C NOT FOR ALL (1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position at the pylon access panels.
(2) Make sure that these access panels are removed (Ref. AMM TASK 54-52-11-000-805) and (Ref. AMM TASK 54-53-11-000-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AL 413BL 413CL 413DL 413AT 413ET
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AL 423BL 423CL 423AT 423ET 481AL
E. Removal of Components
(1) Make sure that the the strips on the Rib 4, Rib 6 and Rib 7 on the left side of the pylon are removed (Ref. AMM TASK 54-52-82-000-801).
4. Procedure(1) Make sure that the the strips on the Rib 4, Rib 6 and Rib 7 on the left side of the pylon are removed (Ref. AMM TASK 54-52-82-000-801).
Subtask 36-11-49-420-144-A ** ON A/C NOT FOR ALL
A. Installation of the Sense Line between the bleed Differential Pressure-Transducer and the Pylon Interface
(1) If you use the APU to energize the electrical circuits, stop the APU:
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.
(4) Clean the component interfaces and the adjacent area.
(5) Remove the PLUG-BLANKING from each disconnected line end.
(6) Remove the PLUG - BLANKING from the port of the bleed differential pressure-transducer (3).
(7) Put the sense line (1) in the correct position between the port of the bleed differential pressure-transducer (3) and the pylon interface (6).
(8) Install the two washers (9), the bolts (8) and the nuts (5).
(a) Tighten the two nuts (5).
(9) Install the pressure transducer (3) (Ref. AMM TASK 36-11-18-400-801). Do not torque the nut (4) at this time.
.
(b) Identify the tightened union nut (7) of the sense line (2) with a red line (Ref. AMM TASK 20-23-22-910-001).
(11) Tighten the union nut (4) (Ref. AMM TASK 36-11-18-400-801).
Subtask 36-11-49-420-149-A ** ON A/C NOT FOR ALL (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).
(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) Do an inspection of the component interfaces and the adjacent area.(4) Clean the component interfaces and the adjacent area.
(5) Remove the PLUG-BLANKING from each disconnected line end.
(6) Remove the PLUG - BLANKING from the port of the bleed differential pressure-transducer (3).
(7) Put the sense line (1) in the correct position between the port of the bleed differential pressure-transducer (3) and the pylon interface (6).
(8) Install the two washers (9), the bolts (8) and the nuts (5).
(a) Tighten the two nuts (5).
(9) Install the pressure transducer (3) (Ref. AMM TASK 36-11-18-400-801). Do not torque the nut (4) at this time.
WARNING:
TIGHTEN THE UNION(S) TO THE CORRECT TORQUE VALUE. IF YOU DO NOT TIGHTEN THEM SUFFICIENTLY, HOT AIR LEAKAGE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(10) Connect the union nut (7) of the sense line (2) to the sense line (1). NOTE: This step is only applicable if the sense line (2) is installed.
(a) TORQUE the union nut (7) of the sense line (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ) . (b) Identify the tightened union nut (7) of the sense line (2) with a red line (Ref. AMM TASK 20-23-22-910-001).
(11) Tighten the union nut (4) (Ref. AMM TASK 36-11-18-400-801).
B. Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Pylon Interface
(1) Do an inspection of the component interfaces and the adjacent area.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Remove the PLUG - BLANKING from the port of the bleed-air precooler exchanger (24).
(5) Put the sense line (2) in the correct position between the port of the bleed-air precooler exchanger (24) and the sense line (1).
(6) Connect the union nut (7) of the sense line (2) to the sense line (1). Do not torque the union nut (7) at this time.
(7) Connect the union nut (23) of the sense line (2) to the port of the bleed-air precooler exchanger (24). Do not torque the union nut (23) at this time.
(8) Install the clamp (11) with the sense line (2) to the support (10).
(9) Install the washer (12) and bolt (13). Do not tighten the bolt (13) at this time.
(10) Install the first part of the clamp (15) to the second part of the clamp (15) with the sense line (2).
(a) Make sure that the second part of the clamp (15) is in the correct position on the support (14).
(b) Install the two washers (16) and bolts (17). Do not tighten the bolts (17) at this time.
(11) Install the bushing (22) in the correct position on the sense line (2).
(12) Install the first part of the clamp (20) with the sense line (2) to the second part of the clamp (20).
(a) Install the two washers (19), the bolts (18) and the nuts (21). Do not tighten the nuts (21) at this time.
(13) Tighten the union nut (23).
.
(b) Identify the tightened union nut (23) of the sense line (2) with a red line (Ref. AMM TASK 20-23-22-910-001).
(14) Tighten the union nut (7).
.
(b) Identify the tightened union nut (7) of the sense line (2) with a red line (Ref. AMM TASK 20-23-22-910-001).
(15) Tighten the bolt (13).
(16) Tighten the two bolts (17).
(17) Tighten the two nuts (21).
Subtask 36-11-49-410-205-A ** ON A/C NOT FOR ALL (1) Do an inspection of the component interfaces and the adjacent area.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Remove the PLUG - BLANKING from the port of the bleed-air precooler exchanger (24).
(5) Put the sense line (2) in the correct position between the port of the bleed-air precooler exchanger (24) and the sense line (1).
(6) Connect the union nut (7) of the sense line (2) to the sense line (1). Do not torque the union nut (7) at this time.
(7) Connect the union nut (23) of the sense line (2) to the port of the bleed-air precooler exchanger (24). Do not torque the union nut (23) at this time.
(8) Install the clamp (11) with the sense line (2) to the support (10).
(9) Install the washer (12) and bolt (13). Do not tighten the bolt (13) at this time.
(10) Install the first part of the clamp (15) to the second part of the clamp (15) with the sense line (2).
(a) Make sure that the second part of the clamp (15) is in the correct position on the support (14).
(b) Install the two washers (16) and bolts (17). Do not tighten the bolts (17) at this time.
(11) Install the bushing (22) in the correct position on the sense line (2).
(12) Install the first part of the clamp (20) with the sense line (2) to the second part of the clamp (20).
(a) Install the two washers (19), the bolts (18) and the nuts (21). Do not tighten the nuts (21) at this time.
(13) Tighten the union nut (23).
WARNING:
TIGHTEN THE UNION(S) TO THE CORRECT TORQUE VALUE. IF YOU DO NOT TIGHTEN THEM SUFFICIENTLY, HOT AIR LEAKAGE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(a) TORQUE the union nut (23) of the sense line (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ) . (b) Identify the tightened union nut (23) of the sense line (2) with a red line (Ref. AMM TASK 20-23-22-910-001).
(14) Tighten the union nut (7).
WARNING:
TIGHTEN THE UNION(S) TO THE CORRECT TORQUE VALUE. IF YOU DO NOT TIGHTEN THEM SUFFICIENTLY, HOT AIR LEAKAGE CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(a) TORQUE the union nut (7) of the sense line (2) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ) . (b) Identify the tightened union nut (7) of the sense line (2) with a red line (Ref. AMM TASK 20-23-22-910-001).
(15) Tighten the bolt (13).
(16) Tighten the two bolts (17).
(17) Tighten the two nuts (21).
C. Installation of the Components
(1) Install the strips on the Rib 4, Rib 6 and Rib 7 on the left side of the pylon (Ref. AMM TASK 54-52-82-400-801).
Subtask 36-11-49-865-218-A ** ON A/C NOT FOR ALL (1) Install the strips on the Rib 4, Rib 6 and Rib 7 on the left side of the pylon (Ref. AMM TASK 54-52-82-400-801).
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 36-11-49-480-086-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1) | |||
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2) | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
E. Prepare for the Leak Test on the Connections of the Sense Lines (1) and (2)
(1) There are two procedures to do a leak check at the connections of the bleed air ducts (duct joint, flexible connections).
(a) Soap solution procedure.
2 Twist tight the seam of the foil wrap.
4 Attach the foil wrap at the two sides of the pneumatic joint with14QEB1 Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
Subtask 36-11-49-790-058-A ** ON A/C NOT FOR ALL (1) There are two procedures to do a leak check at the connections of the bleed air ducts (duct joint, flexible connections).
(a) Soap solution procedure.
- Leaks are permitted if the WATER - SOAPY SOLUTION stays on the joint line with a continuous series of bubbles.
- Leaks are not permitted if the air pressure (from the air source) blows the soap solution off the joint line and prevents a continuous series of bubbles.
NOTE: This procedure is recommended when you do a leak check with hot air.
1 Wind the FOIL - ALUMINUM on the joint once. 2 Twist tight the seam of the foil wrap.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
3 Make the foil wrap as tight as possible on the tube but do not rip the wrap. 4 Attach the foil wrap at the two sides of the pneumatic joint with
F. Leak Test
(1) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-803) or with the APU (Ref. AMM TASK 36-12-00-860-802).
(a) Make sure that there are no leaks at the sense line connections.
5. Close-up(1) Pressurize the bleed system through the HP ground connector (Ref. AMM TASK 36-12-00-860-803) or with the APU (Ref. AMM TASK 36-12-00-860-802).
(a) Make sure that there are no leaks at the sense line connections.
NOTE: There is a leak when the foil installed on the pneumatic connection breaks or when it is too hot.
(2) Remove the materials used to do the leak test on the sense lines (1) and (2) connections. Subtask 36-11-49-410-197-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Put the aircraft back to its initial configuration.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install these access panels (Ref. AMM TASK 54-52-11-400-805) and (Ref. AMM TASK 54-53-11-400-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AL 413BL 413CL 413DL 413AT 413ET
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AL 423BL 423CL 423AT 423ET 481AL
(4) Remove all the fixtures, tools, test and support equipment used during this procedure.
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).
Subtask 36-11-49-862-116-A ** ON A/C NOT FOR ALL (1) Put the aircraft back to its initial configuration.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Install these access panels (Ref. AMM TASK 54-52-11-400-805) and (Ref. AMM TASK 54-53-11-400-804):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AL 413BL 413CL 413DL 413AT 413ET
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AL 423BL 423CL 423AT 423ET 481AL
(4) Remove all the fixtures, tools, test and support equipment used during this procedure.
(5) Remove the access platform(s).
(6) Remove the WARNING NOTICE(S).
B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002) or (Ref. AMM TASK 24-41-00-862-002).
(Ref. AMM TASK 24-41-00-862-002) or (Ref. AMM TASK 24-41-00-862-002).