W DOC AIRBUS | AMM A320F

Decontamination of the Bleed-Air Ducting System through HP Ground Connector with the APU Bleed Pressure

TASK 36-12-00-615-809-A
Decontamination of the Bleed-Air Ducting System through HP Ground Connector with the APU Bleed Pressure

WARNING: WHILE THE APU OPERATES, DO NOT GO INTO THESE AREAS:
  • THE AREA BEHIND THE APU EXHAUST DUCT: 25m (82ft.) REARWARD OF THE DUCT, MORE THAN 3m (10ft.) ABOVE THE GROUND, AND THE WIDTH OF THE HORIZONTAL STABILIZER
  • THE AREA AROUND THE APU AIR-INTAKE: 2m (7ft) AROUND THE INTAKE
  • THE AREA OF THE OIL-COOLER OUTLET.
THERE IS A RISK OF INJURY IF YOU GO INTO THESE AREAS.
WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.
CAUTION: MAKE SURE THAT THE AREA AROUND THE APU IS CLEAR BEFORE YOU START THE APU. TOOLS, EQUIPMENT AND MATERIALS IN THE APU COMPARTMENT AND/OR ON THE ACCESS PLATFORM CAN CAUSE DAMAGE TO THE APU WHEN IT OPERATES.
ZONE: 191
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
AIR START COUPLING
No specific
AR
WARNING NOTICE(S)
C21006-7
1
DEACTIVATOR - CHECK VALVE
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
191
AIR CONDITIONING COMPT AND FAIRINGS
191DB
 C. 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 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
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 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 49-00-00-860-008-A
APU Start by External Power
TASK 49-00-00-860-008-A-01
APU Start 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))
TASK 49-00-00-910-003-A
Safety Precautions for the Operation of the APU (131-9(A))
F Bleed-Air Ducting System - Location and Detail
F BLEED Page
F HP Ground Connector
3. Job Set-up
Subtask 36-12-00-941-075-A
A. Safety Precautions
   (1) Put the aircraft in the APU run-up condition.
   (2) Obey the safety precautions for the operation of the APU:
Subtask 36-12-00-860-139-A
B. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).
   (3) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
   (4) In the cockpit, on AIR COND panel 30VU:
     (a) Make sure that the ENG 1 and 2 BLEED pushbutton-switches are released (the OFF legends are on).
     (b) Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
     (c) Make sure that the PACK 1 and 2 pushbutton switches are released (the OFF legends are on).
     (d) Make sure that the PACK FLOW selector-switch is set to LO.
     (e) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system on the bleed pushbutton switches.
   (5) On ENG panel 115VU:
     (a) Put a WARNING NOTICE(S) in position to tell persons not to start engine 1 and 2.
Subtask 36-12-00-480-068-A
C. Preparation for Cleaning of the Bleed-Air Ducting System
   (1) Install the C21006-7 DEACTIVATOR - CHECK VALVE as follows:
     (a) Open access door 191DB.
     (b) Install the C21006-7 DEACTIVATOR - CHECK VALVE and the AIR START COUPLING to the HP ground connector (7300HM):
       1 Make sure that the HP ground-connector flap is in the fully open position.
4. Procedure
Subtask 36-12-00-615-067-A
A. Cleaning of the Odor Smell in the Bleed-Air Ducting System
   (1) Start the APU:
NOTE: For the aircraft with APU 131-9(A):
  • After the APU starts, Airbus recommends you to wait for a minimum of 3 minutes of warm up period before you select the APU BLEED.
   (2) In the cockpit, on AIR COND panel 30VU:
     (a) Set the APU BLEED pushbutton-switch to the pushed position (the ON legend is on).
   (3) On the ECAM control panel, push the BLEED key:
     (a) On the SD, the BLEED page comes into view.
     (b) The BLEED page shows that the APU bleed air-supply is correct.
   (4) On the ECAM display, make sure that the engine bleed temperature is 200 -10 DEG.C or +10 DEG.C (392 -18 DEG.F or +18 DEG.F).
   (5) Wait for a minimum of 15 minutes.
   (6) The ECAM control panel can show the unusual BLEED and the pack fault messages.
NOTE: The system operates correctly and it is not necessary to do the related troubleshooting procedure at this step.
   (7) In the cockpit, on AIR COND panel 30VU:
     (a) Set the APU BLEED pushbutton-switch to the released position (the ON legend is off).
   (8) Stop the APU:
5. Close-up
Subtask 36-12-00-080-068-A
A. Put the aircraft back to its initial configuration.
   (1) Remove the C21006-7 DEACTIVATOR - CHECK VALVE as follows:
     (a) Remove the C21006-7 DEACTIVATOR - CHECK VALVE and the AIR START COUPLING from the HP ground connector (7300HM):
       1 Make sure that the HP ground-connector flap is in the blocked position.
     (b) Close access door 191DB.
   (2) Make sure that the work area is clean and clear of tools and other items.
Subtask 36-12-00-860-140-A
B. Aircraft Maintenance Configuration
   (1) Remove the WARNING NOTICE(S).
   (2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
   (3) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
   (4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.01 01:14:45 UTC
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