Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA1, 4000HA2) with the HP Ground Source

TASK 36-13-00-615-801-A-02
Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA1, 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: 410
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	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191	AIR CONDITIONING COMPT AND FAIRINGS
211	COCKPIT
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
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 36-11-49-000-001-A	Removal of the Mid Stage Tee Duct
TASK 36-11-49-000-010-B	Removal of the Upper Bleed-Air Duct
TASK 36-11-49-000-040-A	Removal of the Pylon Interface Duct
TASK 36-11-49-000-042-A	Removal of the Pylon Interface Duct
TASK 36-11-49-000-043-A	Removal of the Mid Stage Tee Duct
TASK 36-11-49-400-001-A	Installation of the Mid Stage Tee Duct
TASK 36-11-49-400-010-B	Installation of the Upper Bleed-Air Duct
TASK 36-11-49-400-040-A	Installation of the Pylon Interface Duct
TASK 36-11-49-400-042-A	Installation of the Pylon Interface Duct
TASK 36-11-49-400-043-A	Installation of the Mid Stage Tee Duct
TASK 36-12-00-860-002-A	Pressurization of the Bleed System through the HP Ground Connector
TASK 36-22-00-790-001-A	Leak Check on all the Bleed Air Ducts and the Packs Components
Pressure Regulating Valve ** ON A/C NOT FOR ALL
Bleed Page
HP Ground Connector
Bleed-Air Ducting System- Location and Detail
Pressure Regulating Valve ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 36-13-00-860-050-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 36-13-00-865-050-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
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20
FOR FIN: 1000EM1 (ENGINE1)
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
FOR FIN: 1000EM2 (ENGINE2)
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

Subtask 36-13-00-480-050-A ** ON A/C NOT FOR ALL

C. Preparation for the Cleaning of the Bleed-Air Ducting System
(1) Disconnect the engine bleed-air duct:

(a) Disconnect the bleed air ducts from the PRV (4000HA1, 4000HA2) of engine 1 and 2 (Ref. AMM TASK 36-11-49-000-001) and (Ref. AMM TASK 36-11-49-000-040).
(2) Point the bleed-air joint duct away from the engines and the electrical cables or equipment.

NOTE: The open ends of the bleed-air joint ducts can point in a direction that the hot bleed air is released freely to the atmosphere.

(3) Put a COVER - PROTECTION on the open ends of the PRV (4000HA1, 4000HA2).
(4) Put a BLANKET - HEAT ISOLATION on the adjacent electrical cables and components.

Subtask 36-13-00-480-050-B ** ON A/C NOT FOR ALL

C. Preparation for the Cleaning of the Bleed-Air Ducting System
(1) Disconnect the engine bleed-air duct:

(a) Disconnect the bleed air ducts from the PRV (4000HA1, 4000HA2) of engine 1 and 2 (Ref. AMM TASK 36-11-49-000-010).
(2) Point the bleed-air joint duct away from the engines and the electrical cables or equipment.

NOTE: The open ends of the bleed-air joint ducts can point in a direction that the hot bleed air is released freely to the atmosphere.

(3) Put a COVER - PROTECTION on the open ends of the PRV (4000HA1, 4000HA2).
(4) Put a BLANKET - HEAT ISOLATION on the adjacent electrical cables and components.

Subtask 36-13-00-480-050-D ** ON A/C NOT FOR ALL

C. Preparation for the Cleaning of the Bleed-Air Ducting System
(1) Disconnect the engine bleed-air duct:

(a) Disconnect the bleed air ducts from the PRV (4000HA1, 4000HA2) of engine 1 and 2 (Ref. AMM TASK 36-11-49-000-042) and (Ref. AMM TASK 36-11-49-000-043).
(2) Point the bleed-air joint duct away from the engines and the electrical cables or equipment.

NOTE: The open ends of the bleed-air joint ducts can point in a direction that the hot bleed air is released freely to the atmosphere.

(3) Put a COVER - PROTECTION on the open ends of the PRV (4000HA1, 4000HA2).
(4) Put a BLANKET - HEAT ISOLATION on the adjacent electrical cables and components.

4. Procedure
Subtask 36-13-00-615-050-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 36-12-00-860-002).
(6) Wait for a minimum of 15 minutes.
(7) The ECAM control panel can show the unsual 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.

5. Close-up
Subtask 36-13-00-080-050-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

WARNING: DO NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

(1) Connect the engine bleed-air duct as follows:
(a) Remove the COVER - PROTECTION from the open ends of the PRV (4000HA1, 4000HA2).
(b) Remove the BLANKET - HEAT ISOLATION from the adjacent electrical cables and components.
(c) Connect the bleed air ducts to the PRV (4000HA1, 4000HA2) of engine 1 and 2 (Ref. AMM TASK 36-11-49-400-001) and (Ref. AMM TASK 36-11-49-400-040).
(2) Make sure that the work area is clean and clear of tools and other items.

Subtask 36-13-00-080-050-B ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

WARNING: DO NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

(1) Connect the engine bleed-air duct as follows:
(a) Remove the COVER - PROTECTION from the open ends of the PRV (4000HA1, 4000HA2).
(b) Remove the BLANKET - HEAT ISOLATION from the adjacent electrical cables and components.
(c) Connect the bleed air ducts to the PRV (4000HA1, 4000HA2) of engine 1 and 2 (Ref. AMM TASK 36-11-49-400-010).
(2) Make sure that the work area is clean and clear of tools and other items.

Subtask 36-13-00-080-050-D ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

WARNING: DO NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

(1) Connect the engine bleed-air duct as follows:
(a) Remove the COVER - PROTECTION from the open ends of the PRV (4000HA1, 4000HA2).
(b) Remove the BLANKET - HEAT ISOLATION from the adjacent electrical cables and components.
(c) Connect the bleed air ducts to the PRV (4000HA1, 4000HA2) of engine 1 and 2 (Ref. AMM TASK 36-11-49-400-042) and (Ref. AMM TASK 36-11-49-400-043).
(2) Make sure that the work area is clean and clear of tools and other items.

Subtask 36-13-00-790-050-A ** ON A/C NOT FOR ALL

B. Leak Test
(1) Do a leak test of the bleed-air duct system (Ref. AMM TASK 36-22-00-790-001):
(a) Make sure that there are no leaks.

Subtask 36-13-00-860-051-A ** ON A/C NOT FOR ALL

C. 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 01:15:55 UTC