DOC AIRBUS | AMM A320FRemoval of the Upper Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator
TASK 36-11-49-000-835-A
Removal of the Upper Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 36-11-49-861-127-A
Subtask 36-11-49-020-159-A
[Rev.10 from 2021]
2026.04.01 01:11:55 UTC
Removal of the Upper Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Fan Air-Valve Actuator
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 PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING:
YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.
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 | 1 | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| 98L12003001000 | 1 | HARNESS,SAFETY |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 410 | ENG 1 PYLON BOX AND FORWARD FAIRING |
| 420 | ENG 2 PYLON BOX AND FORWARD FAIRING |
| 472 | PYLON LEADING EDGE |
| 482 | PYLON LEADING EDGE |
| 191DB | |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 413ET, 472AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 423ET, 424CR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-00-00-481-002-A | Installation of the Wingrip |
| 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 27-00-00-480-002-A | Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000) |
| 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 54-53-11-000-806-A | Removal of the Pylon-to-Wing Access Panels and Doors |
Sense Line between the Bleed-Air Precooler Exchanger (Downstream) and the Interface PylonSubtask 36-11-49-861-127-A
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
Subtask 36-11-49-941-146-A (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
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) Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(4) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(5) On access door 191DB, on the HP ground connector:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
(6) On FLAPS panel 114VU:
Subtask 36-11-49-865-228-A (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) Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(4) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(5) On access door 191DB, on the HP ground connector:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
(6) On FLAPS panel 114VU:
- Put the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
- Put a WARNING NOTICE(S) in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 36-11-49-010-278-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1) | |||
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2) | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
D. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the pylon access panels.
(2) Remove these access doors (Ref. AMM TASK 54-53-11-000-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
413ET 472AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
423ET 424CR
Subtask 36-11-49-020-169-A (1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the pylon access panels.
(2) Remove these access doors (Ref. AMM TASK 54-53-11-000-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
413ET 472AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
423ET 424CR
E. Removal of the Component
(1) Remove the thermal blanket (13) from the bleed-air precooler exchanger (10).
(2) Disengagement of the electrical harnesses (5), if necessary:
(a) Remove the six bolts (1) and the six washers (2) from the six clamps (3).
(b) Disengage the six clamps (3) and the three electrical harnesses (5) from the support (4).
4. Procedure(1) Remove the thermal blanket (13) from the bleed-air precooler exchanger (10).
(2) Disengagement of the electrical harnesses (5), if necessary:
(a) Remove the six bolts (1) and the six washers (2) from the six clamps (3).
(b) Disengage the six clamps (3) and the three electrical harnesses (5) from the support (4).
Subtask 36-11-49-020-159-A
A. Removal of the Upper Sense Line between the Bleed-Air Precooler Exchanger (Downstream) 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) Remove the bolt (9) and washer (8) from the clamp (7).
(5) Remove the clamp (7) from the support (6) and the upper sense line (12).
(6) Disconnect the upper sense line (12) from the bleed-air precooler exchanger (10).
(7) Loosen the union nut (14) of the sense line (12).
(8) Disconnect the upper sense line (12) from the lower sense line (15).
(9) Remove the upper sense line (12) from the pylon.
(10) Put a PLUG - BLANKING on the port of the bleed-air precooler exchanger (10) and on the port of the lower sense line (15).
(11) Put the PLUG-BLANKING in each disconnected line end.
(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 (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) Loosen the union nut (11) of the upper sense line (12). (4) Remove the bolt (9) and washer (8) from the clamp (7).
(5) Remove the clamp (7) from the support (6) and the upper sense line (12).
(6) Disconnect the upper sense line (12) from the bleed-air precooler exchanger (10).
(7) Loosen the union nut (14) of the sense line (12).
(8) Disconnect the upper sense line (12) from the lower sense line (15).
(9) Remove the upper sense line (12) from the pylon.
(10) Put a PLUG - BLANKING on the port of the bleed-air precooler exchanger (10) and on the port of the lower sense line (15).
(11) Put the PLUG-BLANKING in each disconnected line end.