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

TASK 36-12-00-615-808-A
Decontamination of the Bleed-Air Ducting System Disconnected at 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	CAP - BLANKING
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, 191KB, 192KB

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 36-12-00-860-802-A	Pressurization of the Bleed System with the APU
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))
TASK 53-35-13-000-002-A	Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A	Installation of the Quick-Release Access Panels on the Belly Fairing Structure
APU DUCTING SYSTEM - LOCATION AND DETAIL
BLEED Page
HP Ground Connector

3. Job Set-up
Subtask 36-12-00-941-068-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Put the aircraft in the APU run-up condition.
(2) Obey the safety precautions for the operation of the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-91)
For APS 3200 APU (Ref. AMM D/O 49-00-00-91)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-910-003).

Subtask 36-12-00-860-125-A ** ON A/C NOT FOR ALL

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(2) BLEED pushbutton-switch is released (the OFF legend is 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.
(5) On the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start engine 1(2).

Subtask 36-12-00-480-061-A ** ON A/C NOT FOR ALL

C. Preparation for Cleaning of the Bleed-Air Ducting System
(1) Disconnect the electrical connectors from the Flow Control Valve (FCV) as follows:
(a) Remove access panels 191KB and 192KB (Ref. AMM TASK 53-35-13-000-002).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(b) Disconnect the electrical connectors.
(c) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(2) Install the C21006-7 DEACTIVATOR - CHECK VALVE:
(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 is in the fully open position.

4. Procedure
Subtask 36-12-00-615-060-A ** ON A/C NOT FOR ALL

A. Cleaning of the Odor Smell in the Bleed-Air Ducting System
(1) Start the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
For APS 3200 APU (Ref. AMM D/O 49-00-00-86)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-008).

NOTE: After the APU starts, Airbus recommends you to wait for a minimum of 3 minutes for the warm up period, before you select the APU BLEED.

(2) In the cockpit, on AIR COND panel 30VU:
(a) Set the PACK 1 and 2 pushbutton-switches to the pushed position (the OFF legends are off).

NOTE: After this step, hot air goes out of the aircraft from the HP ground connector.

(b) 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) Start the pressurization of the bleed-air ducting system with the APU (Ref. AMM TASK 36-12-00-860-802).
(5) 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).
(6) Wait for a minimum of 15 minutes.
(7) The ECAM control panel can show the unusual BLEED and the pack fault messages.

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

(8) Stop the pressurization of the bleed-air ducting system.
(9) In the cockpit, on AIR COND panel 30VU:
(a) Set the APU BLEED pushbutton-switch to the released position (the OFF legend is on).
(10) Stop the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
For APS 3200 APU (Ref. AMM D/O 49-00-00-86)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).

5. Close-up
Subtask 36-12-00-080-061-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Remove the C21006-7 DEACTIVATOR - CHECK VALVE as follows:
(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.
(2) Connect the electrical connectors to the FCV as follows:
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(b) Connect the electrical connectors.
(c) Install access panels 191KB and 192KB (Ref. AMM TASK 53-35-13-400-002).
(3) Make sure that the work area is clean and clear of tools and other items.

Subtask 36-12-00-710-073-A ** ON A/C NOT FOR ALL

B. Operational Test
(1) Do an operational test of the flow control and indicating system (Ref. AMM TASK 21-51-00-710-002).

Subtask 36-12-00-860-126-A ** ON A/C NOT FOR ALL

C. 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 12:37:20 UTC