DOC AIRBUS | AMM A320FInstallation of the Sense Line between the Bleed-Air Precooler Exchanger (Upstream) and the Bleed Differential Pressure-Transducer
TASK 36-11-49-400-826-A
Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Upstream) 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 36-11-49-861-115-A ** ON A/C NOT FOR ALL
Subtask 36-11-49-420-140-A ** ON A/C NOT FOR ALL
Subtask 36-11-49-410-187-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 (Upstream) 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
B. Consumable Materials
| 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 |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 413AT, 413BT, 413CT, 413DT | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 423AT, 423BT, 423CT, 423DT | |
| 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 36-12-00-860-802-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 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
Sense Line between the Bleed-Air Precooler Exchanger (Upstream) and the Bleed Differential Pressure-TransducerSubtask 36-11-49-861-115-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 36-11-49-860-125-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 the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.
Subtask 36-11-49-865-199-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 the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 36-11-49-010-234-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:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT 413BT 413CT 413DT
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT 423BT 423CT 423DT
4. Procedure(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:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT 413BT 413CT 413DT
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT 423BT 423CT 423DT
Subtask 36-11-49-420-140-A ** ON A/C NOT FOR ALL
A. Installation of the Sense Line between the Bleed-Air Precooler Exchanger (Upstream) and the Bleed Differential Pressure-Transducer
(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 blanking plugs from the ports of the bleed-air precooler exchanger (6) and the bleed differential pressure-transducer (3).
(6) Remove the PLUG-BLANKING from each disconnected line end.
(7) Put the sense line (1) in position between the ports of the bleed-air precooler exchanger (6) and the bleed differential pressure-transducer (3).
(8) Connect the nut (5) of the sense line (1) to the port of the bleed-air precooler exchanger (6).
.
(9) Connect the nut (4) of the sense line (1) to the port of the bleed differential pressure-transducer (3).
.
(10) Install the two grommets (2) on the sense line (1).
Subtask 36-11-49-865-200-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 blanking plugs from the ports of the bleed-air precooler exchanger (6) and the bleed differential pressure-transducer (3).
(6) Remove the PLUG-BLANKING from each disconnected line end.
(7) Put the sense line (1) in position between the ports of the bleed-air precooler exchanger (6) and the bleed differential pressure-transducer (3).
(8) Connect the nut (5) of the sense line (1) to the port of the bleed-air precooler exchanger (6).
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 nut (5) of the sense line (1) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ) . (9) Connect the nut (4) of the sense line (1) to the port of the bleed differential pressure-transducer (3).
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 nut (4) of the sense line (1) to between 0.85 and 0.73 m.daN (75.22 and 64.60 lbf.in ) . (10) Install the two grommets (2) on the sense line (1).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 36-11-49-480-082-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 |
C. Prepare for the Leak Test
(1) Do the steps that follow to install FOIL - ALUMINUM on the sense line connections:
Subtask 36-11-49-790-057-A ** ON A/C NOT FOR ALL (1) Do the steps that follow to install FOIL - ALUMINUM on the sense line connections:
- Wind the foil wrap around the joint one time.
- Twist the seam of the foil wrap tight.
- Make the foil wrap as tight as possible on the tube but do not cause damage to the wrap.
- Attach the foil wrap at the two sides of the pneumatic joint with lockwire
14QEB1 Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
D. 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. Subtask 36-11-49-410-187-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:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT 413BT 413CT 413DT
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT 423BT 423CT 423DT
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
Subtask 36-11-49-862-112-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install these access panels:
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT 413BT 413CT 413DT
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT 423BT 423CT 423DT
(3) Remove the access platform(s).
(4) 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).