Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA2) with the HP Ground Source

TASK 36-13-00-615-803-A-01
Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA2) with the HP Ground Source

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: 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.

CAUTION: MAKE SURE THAT THE GROUND AIR-SUPPLY UNIT IS NOT TOO NEAR THE AIRCRAFT AND THAT THE ENGINE EXHAUST PIPE OF THE GROUND AIR- SUPPLY UNIT POINTS AWAY FROM THE AIRCRAFT. HEAT FROM THIS UNIT AND FROM THE EXHAUST CAN CAUSE DAMAGE TO THE AIRCRAFT STRUCTURE.

CAUTION: MAKE SURE THAT THE GROUND-AIR SUPPLY IS FREE FROM OIL CONTAMINATION. OIL CONTAMINATION CAN CAUSE THE SMELL OF OIL IN THE CABIN AND MAKE THE AIR-CONDITIONING PACKS UNSERVICEABLE.

ZONE: 191
ZONE: 211
ZONE: 420

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	BLANKET - HEAT ISOLATION
No specific	AR	COVER - PROTECTION
No specific	1	GROUND AIR-SUPPLY UNIT(HIGH PRESSURE)
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191	AIR CONDITIONING COMPT AND FAIRINGS
211	COCKPIT
420	ENG 2 PYLON BOX AND FORWARD FAIRING
191DB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 05-24-50-210-801-A	General Visual Inspection of Core Compartment (EWIS)
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 26-12-17-000-803-A	Removal of the Aft Fire/Overheat Detector
TASK 26-12-17-400-803-A	Installation of the Aft Fire/Overheat Detector
TASK 26-12-61-000-802-A	Removal of the Loop-A Fire Electrical Harness and the Loop-A Fire Detector Cables
TASK 26-12-61-400-802-A	Installation of the Loop-A Fire Electrical Harness and the Loop-A Fire Detector Cables
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 36-11-00-710-802-A	Operational Test of the Bleed Air System
TASK 36-11-49-000-822-A	Removal of the Environmental Control System (ECS) Ducts
TASK 36-11-49-000-823-A	Removal of the Environmental Control System (ECS) Sense Lines
TASK 36-11-49-400-822-A	Installation of the Environmental Control System (ECS) Ducts
TASK 36-11-49-400-823-A	Installation of the Environmental Control System (ECS) Sense Lines
TASK 36-11-49-400-824-A	Installation of the Environmental Control System (ECS) Interface Duct
TASK 36-11-52-000-802-A	Removal of the Bleed Pressure-Regulator Valve
TASK 36-11-52-400-802-A	Installation of the Bleed Pressure-Regulator Valve
TASK 36-11-53-000-802-A	Removal of the Overpressure Valve
TASK 36-11-53-400-802-A	Installation of the Overpressure Valve
TASK 36-12-00-860-803-A	Pressurization of the Bleed System through the HP Ground Connector
TASK 36-22-00-790-802-A	Leak Check on all the Bleed Air Ducts and the Packs Components
TASK 75-24-49-000-803-A	Removal of the Component Cooling Lines
TASK 75-24-49-400-803-A	Installation of the Component Cooling Lines
TASK 78-32-00-210-821-A	General Visual Inspection (GVI) of the Thrust Reverser Thermal Insulation Blankets
Bleed Page
HP Ground Connector
Pressure Regulating Valve
Bleed-Air Ducting System - Location and Detail

3. Job Set-up
Subtask 36-13-00-860-064-A ** ON A/C NOT FOR ALL

A. 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) 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 in the LO position.
(e) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system on the bleed pushbutton switches.
(5) In the cockpit, on ENG panel 115VU:
(a) Put the WARNING NOTICE(S) in position to tell persons not to start engine 1 and 2.
(6) In the cockpit, on OVERHEAD CTL & IND panel 25VU:
(a) Put the WARNING NOTICE(S) in position to tell persons not to start the APU.

Subtask 36-13-00-865-066-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-13-00-020-051-A ** ON A/C NOT FOR ALL

C. Disconnection of the Environmental Control System (ECS) Interface Duct
(1) Remove the overpressure valve (Ref. AMM TASK 36-11-53-000-802):
(a) Put a COVER - PROTECTION on the open end of the overpressure valve.
(2) Remove the ECS starter duct (Ref. AMM TASK 36-11-49-000-822):
(a) Put a PLUG - BLANKING on the open ends of the ECS starter duct.
(b) Put the COVER - PROTECTION on the open end of the Starter Air Valve (SAV).
(3) Make sure that the link assemblies of the ECS interface duct are installed correctly (Ref. AMM TASK 36-11-49-400-824):
(a) Make sure that the link assemblies are not preloaded and do not move because of the engine vibration.

(4) Remove the PRV (4000HA2) (Ref. AMM TASK 36-11-52-000-802):
(a) Put the COVER - PROTECTION on the open end of the PRV (4000HA2).
(b) Put the PLUG - BLANKING on the open ends of the mid Y-duct.
(5) Remove the Active Clearance Control (ACC) hose (Ref. AMM TASK 75-24-49-000-803):
(a) Put the PLUG - BLANKING on the open ends of the ACC hose.
(6) Remove the ECS sense lines connected to the pylon (Ref. AMM TASK 36-11-49-000-823):
(a) Put the PLUG - BLANKING on the open ends of the ECS sense lines.
(7) Remove the aft fire/overheat detector (Ref. AMM TASK 26-12-17-000-803).
(8) Remove the loop-A fire harness and the electrical rail assembly (Ref. AMM TASK 26-12-61-000-802).
(9) If installed, remove the PLUG - BLANKING from the open end of the ECS interface duct.
(10) Put a BLANKET - HEAT ISOLATION on the adjacent electrical cables and components.

4. Procedure
Subtask 36-13-00-615-057-A ** ON A/C NOT FOR ALL

A. Cleaning of the Odor Smell in the Bleed-Air Ducting System
(1) Open access door 191DB.
(2) Connect a GROUND AIR-SUPPLY UNIT(HIGH PRESSURE) to the HP ground connector (7300HM).
(3) In the cockpit, on AIR COND panel 30VU:
(a) Set the X BLEED selector switch to the OPEN position.
(4) 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 X BLEED valve is in the OPEN position.
(5) Start the GROUND AIR-SUPPLY UNIT(HIGH PRESSURE) (Ref. AMM TASK 36-12-00-860-803).
(6) Wait for a minimum of 15 minutes.
(7) The ECAM control panel can show the unusual BLEED and pack fault messages.

NOTE: The system operates correctly and it is not necessary to do the related troubleshooting procedure at this step.

(8) Stop the GROUND AIR-SUPPLY UNIT(HIGH PRESSURE).
(9) In the cockpit, on AIR COND panel 30VU:
(a) Set the X BLEED selector switch to the AUTO position.
(10) Disconnect the GROUND AIR-SUPPLY UNIT(HIGH PRESSURE) from the HP ground connector (7300HM).
(11) Close access door 191DB.

Subtask 36-13-00-210-056-A ** ON A/C NOT FOR ALL

B. General Visual Inspection (GVI)
(1) Do a GVI of the core compartment (Ref. AMM TASK 05-24-50-210-801):
(a) Specially, examine the area/components near the exhaust plumes of the ECS interface duct.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

(b) If you see contamination, use the manufacturer's instructions to clean them.
(2) Do a GVI of the thrust-reverser thermal blanket (Ref. AMM TASK 78-32-00-210-821):
(a) Specially, examine the thermal blankets near the exhaust plumes of the ECS interface ducts.

5. Close-up
Subtask 36-13-00-420-051-A ** ON A/C NOT FOR ALL

A. Connection of the ECS Interface Duct
(1) Remove the BLANKET - HEAT ISOLATION from the adjacent electrical cables and components.
(2) Install the aft fire/overheat detector (Ref. AMM TASK 26-12-17-400-803).
(3) Install the loop-A fire harness and the electrical rail assembly (Ref. AMM TASK 26-12-61-400-802).
(4) Install the ECS sense lines:
(a) Remove the PLUG - BLANKING from the open ends of the ECS sense lines.
(b) Install the ECS sense lines connected to the pylon (Ref. AMM TASK 36-11-49-400-823).
(5) Install the ACC hose:
(a) Remove the PLUG - BLANKING from the open ends of the ACC hose.
(b) Install the ACC hose (Ref. AMM TASK 75-24-49-400-803).
(6) Install the PRV:
(a) Remove the COVER - PROTECTION from the open end of the PRV (4000HA2).
(b) Remove the PLUG - BLANKING from the open ends of the mid Y-duct.
(c) Install the PRV (4000HA2) (Ref. AMM TASK 36-11-52-400-802).
(7) Install the ECS starter duct:
(a) Remove the PLUG - BLANKING from the open ends of the ECS starter duct.
(b) Remove the COVER - PROTECTION from the open end of the SAV.
(c) Install the ECS starter duct (Ref. AMM TASK 36-11-49-400-822).
(8) Install the overpressure valve:
(a) Remove the COVER - PROTECTION from the open end of the overpressure valve.
(b) Install the overpressure valve (Ref. AMM TASK 36-11-53-400-802).
(9) Make sure that the work area is clean and clear of tools and other items.

Subtask 36-13-00-710-065-A ** ON A/C NOT FOR ALL

B. Operational Test
(1) Do an operational test of the bleed-air duct system (Ref. AMM TASK 36-11-00-710-802).

Subtask 36-13-00-790-057-A ** ON A/C NOT FOR ALL

C. Leak Test
(1) Do a leak test of the bleed-air duct system (Ref. AMM TASK 36-22-00-790-802):
(a) Make sure that there are no leaks.

Subtask 36-13-00-860-065-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) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 01:15:58 UTC