W DOC AIRBUS | AMM A320F

Decontamination of the Bleed-Air Ducting System Disconnected at HP Ground Connector with Engine 1 Bleed Pressure

TASK 36-11-00-615-801-A
Decontamination of the Bleed-Air Ducting System Disconnected at HP Ground Connector with Engine 1 Bleed Pressure

WARNING: MAKE SURE THAT WHEN THE ENGINES OPERATE ON THE GROUND:
  • NO PERSONS GO WHERE THE AIRCRAFT CAN CAUSE THEM INJURY OR CAN KILL THEM
  • NO OBJECTS STAY WHERE THE ENGINES CAN BLOW THEM AWAY OR WHERE THEY CAN BE PULLED INTO THE ENGINES BY SUCTION.
WARNING: BE CAREFUL WHEN THE DUCTS ARE DISCONNECTED THE TEMPERATURE OF THE EXHAUST GASES FROM THE OPEN ENDS OF THE DISCONNECTED DUCTS CAN BE AS HIGH AS 270 DEG.C (518 DEG.F). THE HOT GASES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
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.
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
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
98F10103500000
AR
CHOCK-MLG,ENGINE RUN-UP
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 21-51-00-710-002-A
Operational Test of the Flow Control and Indicating System
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 71-00-00-710-003-A
Engine Automatic Start
TASK 71-00-00-710-003-B
Engine Automatic Start
TASK 71-00-00-710-018-A
Discontinued Start, Restart and Shutdown Procedures
TASK 71-00-00-710-028-A
Engine Shutdown
TASK 71-00-00-710-028-B
Engine Shutdown
TASK 71-00-00-710-043-A
Normal Engine Automatic-Start Procedure
TASK 71-00-00-860-012-A
Engine Safety Precautions
TASK 71-00-00-869-004-A
Safety Precautions During Engine Ground Operations
TASK 71-00-00-869-006-A
Safety Precautions During Engine Ground Operations
F Tool Installation
F HP Ground Connector
F Bleed-Air Ducting System - Location and Detail
F BLEED Page
3. Job Set-up
Subtask 36-11-00-941-181-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Obey the safety precautions during the engine ground operations (Ref. AMM TASK 71-00-00-869-006).
   (2)
F Tool Installation ** ON A/C NOT FOR ALL
Subtask 36-11-00-941-181-B ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Obey the safety precautions during the engine ground operations (Ref. AMM TASK 71-00-00-860-012).
   (2)
F Tool Installation ** ON A/C NOT FOR ALL
Subtask 36-11-00-941-181-D ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Obey the safety precautions during the engine ground operations (Ref. AMM TASK 71-00-00-869-004).
   (2)
F Tool Installation ** ON A/C NOT FOR ALL
Subtask 36-11-00-865-220-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR BLEED/X FEED/VALVE/BAT2HVD13
122VUAIR BLEED/X FEED VALVE/NORM1HVZ20
FOR FIN: 1000EM1 (ENGINE1)
49VUAIR BLEED/ENG 1/CTL3HA1D12
49VUAIR BLEED/ENG 1/MONG2HA1D11
Subtask 36-11-00-865-242-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/TEMP CTL/SYS 1 CHAN B/28VDC52HHD08
122VUAIR COND/TEMP CTL SYS 1/CHAN A/115VAC49HHX22
122VUAIR COND/TEMP CTL SYS 1/CHAN A/28VDC51HHX21
122VUAIR COND/TEMP CTL SYS 1/CHAN B/115VAC50HHY18
Subtask 36-11-00-860-226-A ** ON A/C NOT FOR ALL
D. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
   (2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
   (3) 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 the LO position.
     (e) Set the X BLEED selector-switch to the SHUT position.
   (4) In the cockpit, on OVERHEAD CTL and IND panel 25VU:
     (a) Put a WARNING NOTICE(S) in position to tell the persons not to start the APU.
Subtask 36-11-00-480-142-A ** ON A/C NOT FOR ALL
E. Preparation for Cleaning of the Bleed-Air Ducting System
WARNING: MAKE SURE THAT WHEN THE ENGINES OPERATE ON THE GROUND:
  • NO PERSONS GO WHERE THE AIRCRAFT CAN CAUSE THEM INJURY OR CAN KILL THEM
  • NO OBJECTS STAY WHERE THE ENGINES CAN BLOW THEM AWAY OR WHERE THEY CAN BE PULLED INTO THE ENGINES BY SUCTION.
   (1) Start engine 1 and keep the engine RPM to idle (Ref. AMM TASK 71-00-00-710-003).
   (2) Install a C21006-7 DEACTIVATOR - CHECK VALVE:
     (a) In the cockpit, on AIR COND panel 30VU:
       1 Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on).
       2 Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
     (b) On the ECAM control panel, push the BLEED key:
       1 On the SD, the BLEED page comes into view.
       2 On the BLEED page, do a check of:
  • The pressure value in the duct that reads the bleed pressure sensor
  • The temperature value in the duct that reads the bleed temperature sensor.
       3 On the BLEED page, make sure that the Pressure Regulating Valve (PRV) is closed.
     (c) When the pressure and temperature values in the duct are almost the same as the external pressure and temperature values:
       1 Make sure that access door 191DB is open.
       2
F HP Ground Connector ** ON A/C NOT FOR ALL
       3 Make sure that the HP ground connector is in the fully open position.
Subtask 36-11-00-480-142-B ** ON A/C NOT FOR ALL
E. Preparation for Cleaning of the Bleed-Air Ducting System
WARNING: MAKE SURE THAT WHEN THE ENGINES OPERATE ON THE GROUND:
  • NO PERSONS GO WHERE THE AIRCRAFT CAN CAUSE THEM INJURY OR CAN KILL THEM
  • NO OBJECTS STAY WHERE THE ENGINES CAN BLOW THEM AWAY OR WHERE THEY CAN BE PULLED INTO THE ENGINES BY SUCTION.
   (1) Start engine 1 and keep the engine RPM to idle (Ref. AMM TASK 71-00-00-710-043).
   (2) Install a C21006-7 DEACTIVATOR - CHECK VALVE:
     (a) In the cockpit, on AIR COND panel 30VU:
       1 Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on).
       2 Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
     (b) On the ECAM control panel, push the BLEED key:
       1 On the SD, the BLEED page comes into view.
       2 On the BLEED page, do a check of:
  • The pressure value in the duct that reads the bleed pressure sensor
  • The temperature value in the duct that reads the bleed temperature sensor.
       3 On the BLEED page, make sure that the Pressure Regulating Valve (PRV) is closed.
     (c) When the pressure and temperature values in the duct are almost the same as the external pressure and temperature values:
       1 Make sure that access door 191DB is open.
       2
F HP Ground Connector ** ON A/C NOT FOR ALL
       3 Make sure that the HP ground connector is in the fully open position.
Subtask 36-11-00-480-142-D ** ON A/C NOT FOR ALL
E. Preparation for Cleaning of the Bleed-Air Ducting System
WARNING: MAKE SURE THAT WHEN THE ENGINES OPERATE ON THE GROUND:
  • NO PERSONS GO WHERE THE AIRCRAFT CAN CAUSE THEM INJURY OR CAN KILL THEM
  • NO OBJECTS STAY WHERE THE ENGINES CAN BLOW THEM AWAY OR WHERE THEY CAN BE PULLED INTO THE ENGINES BY SUCTION.
   (1) Start engine 1 and keep the engine RPM to idle (Ref. AMM TASK 71-00-00-710-003).
   (2) Install a C21006-7 DEACTIVATOR - CHECK VALVE:
     (a) In the cockpit, on AIR COND panel 30VU:
       1 Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on).
       2 Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
     (b) On the ECAM control panel, push the BLEED key:
       1 On the SD, the BLEED page comes into view.
       2 On the BLEED page, do a check of:
  • The pressure value in the duct that reads the bleed pressure sensor
  • The temperature value in the duct that reads the bleed temperature sensor.
       3 On the BLEED page, make sure that the Pressure Regulating Valve (PRV) is closed.
     (c) When the pressure and temperature values in the duct are almost the same as the external pressure and temperature values:
       1 Make sure that access door 191DB is open.
       2
F HP Ground Connector ** ON A/C NOT FOR ALL
       3 Make sure that the HP ground connector is in the fully open position.
Subtask 36-11-00-480-142-E
DELETED
Subtask 36-11-00-480-142-G
DELETED
4. Procedure
Subtask 36-11-00-615-051-A ** ON A/C NOT FOR ALL
A. Cleaning of the Odor Smell in the Bleed-Air Ducting System
   (1) In the cockpit, on AIR COND panel 30VU:
     (a) Set the ENG 1 BLEED pushbutton switch to the pushed position (the OFF legend is off).
   (2) On the ECAM control panel, push the BLEED key:
     (a) On the SD, the BLEED page comes into view.
     (b) Make sure that the PRV is open.
   (3) On the ECAM display, make sure that the engine 1 bleed temperature is 200 -10 deg.C or +10 deg.C (392 -50 deg.F or +50 deg.F):
     (a) If necessary, slowly push the ENGINE-1 thrust lever to make the engine 1 bleed temperature to 200 -10 deg.C or +10 deg.C (392 -50 deg.F or +50 deg.F). Not reach more than 40% of N1.
   (4) Wait for a minimum of 15 minutes.
   (5) The ECAM control panel can show abnormal BLEED and pack fault messages.
NOTE: The system operates correctly and it is not necessary to do the related troubleshooting procedure at this step.
   (6) Slowly pull the ENGINE-1 thrust lever to the idle position.
   (7) In the cockpit, on AIR COND panel 30VU:
     (a) Set the ENG 1 BLEED pushbutton switch to the released position (the OFF legend is on).
   (8) Stop engine 1 (Ref. AMM TASK 71-00-00-710-028).
Subtask 36-11-00-615-051-B ** ON A/C NOT FOR ALL
A. Cleaning of the Odor Smell in the Bleed-Air Ducting System
   (1) In the cockpit, on AIR COND panel 30VU:
     (a) Set the ENG 1 BLEED pushbutton switch to the pushed position (the OFF legend is off).
   (2) On the ECAM control panel, push the BLEED key:
     (a) On the SD, the BLEED page comes into view.
     (b) Make sure that the PRV is open.
   (3) On the ECAM display, make sure that the engine 1 bleed temperature is 200 -10 deg.C or +10 deg.C (392 -50 deg.F or +50 deg.F):
     (a) If necessary, slowly push the ENGINE-1 thrust lever to make the engine 1 bleed temperature to 200 -10 deg.C or +10 deg.C (392 -50 deg.F or +50 deg.F). Not reach more than 40% of N1.
   (4) Wait for a minimum of 15 minutes.
   (5) The ECAM control panel can show abnormal BLEED and pack fault messages.
NOTE: The system operates correctly and it is not necessary to do the related troubleshooting procedure at this step.
   (6) Slowly pull the ENGINE-1 thrust lever to the idle position.
   (7) In the cockpit, on AIR COND panel 30VU:
     (a) Set the ENG 1 BLEED pushbutton switch to the released position (the OFF legend is on).
   (8) Stop engine 1 (Ref. AMM TASK 71-00-00-710-018).
Subtask 36-11-00-615-051-D ** ON A/C NOT FOR ALL
A. Cleaning of the Odor Smell in the Bleed-Air Ducting System
   (1) In the cockpit, on AIR COND panel 30VU:
     (a) Set the ENG 1 BLEED pushbutton switch to the pushed position (the OFF legend is off).
   (2) On the ECAM control panel, push the BLEED key:
     (a) On the SD, the BLEED page comes into view.
     (b) Make sure that the PRV is open.
   (3) On the ECAM display, make sure that the engine 1 bleed temperature is 200 -10 deg.C or +10 deg.C (392 -50 deg.F or +50 deg.F):
     (a) If necessary, slowly push the ENGINE-1 thrust lever to make the engine 1 bleed temperature to 200 -10 deg.C or +10 deg.C (392 -50 deg.F or +50 deg.F). Not reach more than 40% of N1.
   (4) Wait for a minimum of 15 minutes.
   (5) The ECAM control panel can show abnormal BLEED and pack fault messages.
NOTE: The system operates correctly and it is not necessary to do the related troubleshooting procedure at this step.
   (6) Slowly pull the ENGINE-1 thrust lever to the idle position.
   (7) In the cockpit, on AIR COND panel 30VU:
     (a) Set the ENG 1 BLEED pushbutton switch to the released position (the OFF legend is on).
   (8) Stop engine 1 (Ref. AMM TASK 71-00-00-710-028).
5. Close-up
Subtask 36-11-00-080-119-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2)
F HP Ground Connector ** ON A/C NOT FOR ALL
     (a) Remove the AIR START COUPLING from the HP ground connector (7300HM).
     (b) Remove the C21006-7 DEACTIVATOR - CHECK VALVE from the HP ground connector (7300HM):
       1 Make sure that the HP ground connector is in the blocked position.
     (c) Close access door 191DB.
Subtask 36-11-00-080-119-B
DELETED
Subtask 36-11-00-865-243-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUAIR COND/TEMP CTL/SYS 1 CHAN B/28VDC52HHD08
122VUAIR COND/TEMP CTL SYS 1/CHAN A/115VAC49HHX22
122VUAIR COND/TEMP CTL SYS 1/CHAN A/28VDC51HHX21
122VUAIR COND/TEMP CTL SYS 1/CHAN B/115VAC50HHY18
Subtask 36-11-00-710-069-A ** ON A/C NOT FOR ALL
C. Operational Test
   (1) Do an operational test of the flow control and indicating system (Ref. AMM TASK 21-51-00-710-002).
Subtask 36-11-00-860-227-A ** ON A/C NOT FOR ALL
D. Aircraft Maintenance Configuration
   (1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
   (2) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
   (3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
   (4)
F Tool Installation ** ON A/C NOT FOR ALL
   (5) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 01:06:00 UTC
"Aviabrain" 2025