Decontamination of the Bleed Air Ducts - Level C

TASK 36-10-00-615-804-A
Decontamination of the Bleed Air Ducts - Level C

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

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: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.

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

ZONE: 191
ZONE: 211
ZONE: 310

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	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98F10103500000	AR	CHOCK-MLG,ENGINE RUN-UP

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191	AIR CONDITIONING COMPT AND FAIRINGS
211	COCKPIT
310	FUSLG TAIL SECTION AFT OF AFT PRESS BHD
191DB

D. 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 36-11-00-615-802-A	Decontamination of the Bleed-Air Ducting System Disconnected at HP Ground Connector with Engine 1 Bleed Pressure
TASK 36-11-00-615-802-A-01	Decontamination of the Bleed-Air Ducting System Disconnected at HP Ground Connector with Engine 2 Bleed Pressure
TASK 36-11-00-615-807-A	Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA2) with ENGINE 1 Bleed Pressure
TASK 36-11-00-615-807-A-01	Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA1) with ENGINE 2 Bleed Pressure
TASK 36-12-00-615-801-A	Decontamination of the Bleed-Air Ducting System Disconnected at APU Load-Compressor Valve with Engine 1 Bleed Pressure
TASK 36-12-00-615-801-A-01	Decontamination of the Bleed-Air Ducting System Disconnected at APU Load-Compressor Valve with Engine 2 Bleed Pressure
TASK 36-12-00-615-805-A	Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA1, 4000HA2) with the APU Bleed Pressure
TASK 36-12-00-615-805-A-01	Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA1) with the APU Bleed Pressure
TASK 36-12-00-615-805-A-02	Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA2) 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
TASK 36-12-41-000-001-A	Removal of a Bleed-Air Duct
TASK 36-12-41-400-001-A	Installation of a Bleed-Air Duct
TASK 36-13-00-615-802-A	Decontamination of the Bleed-Air Ducting System Disconnected at the Pressure Regulating Valve (PRV) (4000HA1) with the HP Ground Source
TASK 36-13-00-615-802-A-01	Decontamination of the Bleed-Air Ducting System Disconnected at Pressure Regulating Valve (PRV) (4000HA2) with the HP Ground Source
TASK 36-13-00-615-802-A-02	Decontamination of the Bleed-Air Ducting System Disconnected at the Pressure Regulating Valve (PRV) (4000HA1, 4000HA2) with the HP Ground Source
TASK 36-13-00-615-805-A	Decontamination of the Bleed-Air Ducting System Disconnected at the APU Load-Compressor Valve with the HP Ground Source
TASK 36-22-00-790-803-A	Leak Check on all the Bleed Air Ducts and the Pack Components
TASK 49-00-00-910-003-A	Safety Precautions for the Operation of the APU (131-9(A))
TASK 49-11-11-000-004-A	Removal of the Power Plant (APU) (131-9(A))
TASK 49-11-11-400-004-A	Installation of the Power Plant (APU) (131-9(A))
TASK 71-00-00-869-803-A	Safety Precautions During Engine Ground Operations
Decision Table

3. Job Set-up
Subtask 36-10-00-941-053-A

A. Safety Precautions
(1) If you use the engine during ground operations, obey the safety precautions (Ref. AMM TASK 71-00-00-869-803).
(2) Use the 98F10103500000 CHOCK-MLG,ENGINE RUN-UP if the power run above the idle speed is necessary after the engine starts.
(3) If you use the APU during ground operations, obey the safety precautions:

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 36-10-00-860-056-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 (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) Make sure that the X BLEED selector switch is in the AUTO position.
(4) In the cockpit, on the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR 1 and 2 pushbutton switch is off.

Subtask 36-10-00-865-054-A

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/28VDC	55HH	W21
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/28VDC	56HH	Y21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/115VAC	54HH	Y20
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20

4. Procedure
Subtask 36-10-00-100-052-A

A. Inspection and Cleaning of the APU Bleed Air-Duct forward of the Load Control Valve

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.

(1) In the cockpit, put the WARNING NOTICE(S) in position to tell persons not to start the APU or the engines.
(2) Open the access door 191DB.
(3) On the HP ground connector (7300HM):
(a) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
(4) Remove the APU bleed-air duct-elbow that is installed forward of the load control valve (between FR80 and FR82):

For GTCP 36-300 APU (Ref. AMM D/O 49-11-11-00)
For APS 3200 APU (Ref. AMM D/O 49-11-11-00)
For 131-9(A) APU (Ref. AMM TASK 49-11-11-000-004).

(5) Do a check for the large quantities of oil in the ducts or connector grooves of the V-flanges. If you see oil, clean them.
(6) Clean the dirty ducts with a Textile-Lint free Cotton - (Material No.14SBA1) and Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .
(7) Install the removed APU bleed-air duct-elbow:

For GTCP 36-300 APU (Ref. AMM D/O 49-11-11-40)
For APS 3200 APU (Ref. AMM D/O 49-11-11-40)
For 131-9(A) APU (Ref. AMM TASK 49-11-11-400-004).

(8) Do the leak check of the APU bleed-air duct (Ref. AMM TASK 36-22-00-790-803).

Subtask 36-10-00-100-053-B

B. Inspection and Cleaning of the Bleed Air Duct

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.

WARNING: DO NOT TOUCH THE COMPONENT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS.

(1) In the cockpit:

Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to start the APU or the engines.

(2) On the HP ground connector (7300HM):
(a) Make sure that the WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
(3) Remove the section of the bleed air duct that is installed between ozone filter 100HM (101HM) and FR35/FR35.8 (Ref. AMM TASK 36-12-41-000-001).
(4) Do a check for the large quantities of oil in the ducts and the ozone filter. If you see oil, clean them.
(5) Clean the dirty ducts and areas of the ozone filters that you can get access to with a Textile-Lint free Cotton - (Material No.14SBA1) and Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .
(6) Install the removed sections of the bleed air duct (Ref. AMM TASK 36-12-41-400-001).
(7) Remove the WARNING NOTICE(S).
(8) Close the access door 191DB.

Subtask 36-10-00-865-058-A

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/28VDC	55HH	W21
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/28VDC	56HH	Y21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/115VAC	54HH	Y20
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20

Subtask 36-10-00-800-053-A

D. Cleaning of the Bleed Air Ducts

Decision Table

For variant 1, go to step 1.
For variant 2, go to step 2.
For variant 3, go to step 3.
For variant 4, go to step 4.
For variant 5, go to step 5.
For variant 6, go to step 6.
For variant 7, go to step 7.
For variant 8, go to step 8.
For variant 9, go to step 9.
For variant 10, go to step 10.
For variant 11, go to step 11.
For variant 12, go to step 12.
For variant 13, go to step 13.
For variant 14, go to step 14.

(1) Do the decontamination of the bleed air ducts by residual burning (Ref. AMM TASK 36-12-00-615-805).

NOTE: This step is applicable to variant 1 given in the decision table.

(2) Do the decontamination of the bleed air ducts by residual burning (Ref. AMM TASK 36-12-00-615-805).

NOTE: This step is applicable to variant 2 given in the decision table.

(3) Do the decontamination of the bleed air ducts by residual burning (Ref. AMM TASK 36-12-00-615-805).

NOTE: This step is applicable to variant 3 given in the decision table.

(4) Do the decontamination of the bleed air ducts by residual burning (Ref. AMM TASK 36-11-00-615-807).

NOTE: This step is applicable to variant 4 given in the decision table.

(5) Do the decontamination of the bleed air ducts by residual burning (Ref. AMM TASK 36-11-00-615-807).

NOTE: This step is applicable to variant 5 given in the decision table.

(6) Do the decontamination of the bleed air ducts with the use of the HP ground connector (Ref. AMM TASK 36-11-00-615-802).

NOTE: This step is applicable to variant 6 given in the decision table.

(7) Do the decontamination of the bleed air ducts with the use of the HP ground connector (Ref. AMM TASK 36-11-00-615-802).

NOTE: This step is applicable to variant 7 given in the decision table.

(8) Do the decontamination of the bleed air ducts with the use of the HP ground connector (Ref. AMM TASK 36-12-00-615-809).

NOTE: This step is applicable to variant 8 given in the decision table.

(9) Do the decontamination of the bleed air ducts with the use of the engine reverse flow (Ref. AMM TASK 36-12-00-615-801).

NOTE: This step is applicable to variant 9 given in the decision table.

(10) Do the decontamination of the bleed air ducts with the use of the engine reverse flow (Ref. AMM TASK 36-12-00-615-801).

NOTE: This step is applicable to variant 10 given in the decision table.

(11) Do the decontamination of the bleed air ducts with the use of the HP ground source (Ref. AMM TASK 36-13-00-615-805).

NOTE: This step is applicable to variant 11 given in the decision table.

(12) Do the decontamination of the bleed air ducts with the use of the HP ground source (Ref. AMM TASK 36-13-00-615-802).

NOTE: This step is applicable to variant 12 given in the decision table.

(13) Do the decontamination of the bleed air ducts with the use of the HP ground source (Ref. AMM TASK 36-13-00-615-802).

NOTE: This step is applicable to variant 13 given in the decision table.

(14) Do the decontamination of the bleed air ducts with the use of the HP ground source (Ref. AMM TASK 36-13-00-615-802).

NOTE: This step is applicable to variant 14 given in the decision table.

5. Close-up
Subtask 36-10-00-860-055-A

A. Aircraft Maintenance Configuration
(1) Remove all the fixtures, tools, test and support equipment used during this procedure.
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:05:51 UTC