Installation of the Oxygen Pressure Regulator/Transmitters

TASK 35-13-15-400-802-A
Installation of the Oxygen Pressure Regulator/Transmitters

WARNING: DO NOT FILL OR REPLACE A CREW OXYGEN CYLINDER OR REPLACE A VALVE ASSEMBLY ON THE CREW OXYGEN SYSTEM WHEN YOU FUEL OR DEFUEL THE AIRCRAFT. KEEP ALL HYDROCARBONS (FUELS, LUBRICANTS, ETC.) AWAY FROM ALL SOURCES OF OXYGEN. OXYGEN BECOMES EXPLOSIVE WHEN IT TOUCHES HYDROCARBONS.

WARNING: CLEAN THE TOOLS AND MAKE SURE YOUR HANDS ARE CLEAN TO PREVENT CONTAMINATION OF THE OXYGEN SYSTEM.

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

CAUTION: BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.

ZONE: 123
ZONE: 210
FIN: 4HT ** ON A/C NOT FOR ALL
FIN: 4HT2 ** ON A/C NOT FOR ALL

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	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)
FOR [4HT] (XMTR/PRESS REG-OXY)
No specific	1	NITROGEN COMPRESSED SOURCE - GROUND
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )
FOR [4HT2] (PRESS.TRANSM.REGULATO)
No specific	1	NITROGEN COMPRESSED SOURCE - GROUND
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )
FOR [5750HM1] (OXYGEN CYLINDER)
No specific	AR	BAG - VINYL
No specific	AR	BAG - VINYL, SEALED
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN
No specific	Torque wrench: range to between 1.581 and 1.129 m.daN (139.91 and 99.91 lbf.in )
No specific	Torque wrench: range to between 2.03 and 1.47 m.daN (14.97 and 10.84 lbf.ft )
No specific	Torque wrench: range to between 3.95 and 3.05 m.daN (29.13 and 22.49 lbf.ft )
No specific	Torque wrench: range to between 8 and 7 m.daN (59.00 and 51.62 lbf.ft )
FOR [5750HM2] (OXYGEN CYLINDER)
No specific	AR	BAG - VINYL
No specific	AR	BAG - VINYL, SEALED
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN
No specific	Torque wrench: range to between 1.581 and 1.129 m.daN (139.91 and 99.91 lbf.in )
No specific	Torque wrench: range to between 2.03 and 1.47 m.daN (14.97 and 10.84 lbf.ft )
No specific	Torque wrench: range to between 3.95 and 3.05 m.daN (29.13 and 22.49 lbf.ft )
No specific	Torque wrench: range to between 8 and 7 m.daN (59.00 and 51.62 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
(Material No.14SBA1)	Textile-Lint free Cotton -
FOR [4HT] (XMTR/PRESS REG-OXY)
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
(Material No.14SBA1)	Textile-Lint free Cotton -
FOR [4HT2] (PRESS.TRANSM.REGULATO)
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
123	NOSE GEAR WELL
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
812

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
FOR [5750HM1] (OXYGEN CYLINDER)
2	RING	AIPC 35-11-81-02-020
8	RING	AIPC 35-12-81-09-010
8	RING	AIPC 35-12-81-09-015
5	RING	AIPC 35-12-81-09-020
FOR [5750HM2] (OXYGEN CYLINDER)
12	RING	AIPC 35-11-81-03-020
15	RING	AIPC 35-12-81-11-010
18	RING	AIPC 35-12-81-11-030

E. 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 35-00-00-860-001-A	Special Precautions When Working on a Gaseous Oxygen System
TASK 35-10-00-870-802-A	Bleeding of the Crew Oxygen System (Manual Shutoff Valve(s) of the Crew Oxygen-Storage Cylinder(s) is (are) Open)
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Oxygen Pressure Regulator/Transmitters
Oxygen Filling Port
FOR [4HT] (XMTR/PRESS REG-OXY)
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
FOR [4HT2] (PRESS.TRANSM.REGULATO)
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
FOR [5750HM1] (OXYGEN CYLINDER)
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
FOR [5750HM2] (OXYGEN CYLINDER)
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque

3. Job Set-up
Subtask 35-13-15-860-057-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration

WARNING: WHEN YOU DO WORK ON THE GASEOUS OXYGEN SYSTEM, MAKE SURE THAT YOU OBEY ALL THE APPLICABLE SAFETY PRECAUTIONS. IF YOU DO NOT OBEY THESE PRECAUTIONS, INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT CAN OCCUR.

(1) Obey the special precautions when you do work on a gaseous oxygen system (Ref. AMM TASK 35-00-00-860-001).
(2) Make sure that the aircraft electrical circuits are energized
(Ref. AMM TASK 24-41-00-861-002).
(3) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:
(a) Make sure that the CREW SUPPLY pushbutton switch is released (the OFF legend is on).
(b) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the CREW SUPPLY pushbutton switch.

Subtask 35-13-15-010-054-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at access door 812.
(2) Make sure that access door 812 is open (Ref. AMM TASK 52-41-00-010-002).

Subtask 35-13-15-860-061-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the manual shutoff valves of the crew oxygen-storage cylinders are fully closed.
(2) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to open the manual shutoff valves of the crew oxygen-storage cylinders.

Subtask 35-13-15-865-056-A ** ON A/C NOT FOR ALL

D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	OXYGEN/CREW/OXY/SPLY	1HT	HA01

4. Procedure
Subtask 35-13-15-420-052-B ** ON A/C NOT FOR ALL

A. Installation of the Oxygen Pressure Regulator/Transmitters 4HT and 4HT2
(1) Make sure that the parts that were disconnected from the removed component are clean and in the correct condition.
(2) FOR [5750HM1] (OXYGEN CYLINDER)
(a) Remove the stowage cap from the oxygen supply outlet (4) and put it in its bag.

NOTE: The stowage cap of the oxygen supply outlet (4) must be put in the bag attached to the valve assy of the crew oxygen-storage cylinder 5750HM1.

(b) Remove the oxygen pressure regulator/transmitter (4HT) (10) from the BAG - VINYL, SEALED.
(c) Install the oxygen pressure regulator/transmitter (4HT) (10).

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT EQUIPMENT FROM FLEXIBLE HOSES AND RIGID TUBING. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL CAUSE DAMAGE TO THE HOSES AND TUBES.

1 Install the oxygen pressure regulator/transmitter (4HT) (10) on the oxygen supply outlet (4).
2 TORQUE the nut (3) to between 8 and 7 m.daN (59.00 and 51.62 lbf.ft )

.
3 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(d) Install the HP oxygen-replenishing hose (5767HM1) (1).

1 Remove the BAG - VINYL from the disconnected end of the HP oxygen-replenishing hose (5767HM1) (1).
2 Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the HP oxygen-replenishing hose (5767HM1) (1).
3 Install a new AIPC 35-11-81-02-020 RING (2) on the HP oxygen-replenishing hose (5767HM1) (1).
4 Install the HP oxygen-replenishing hose (5767HM1) (1) on the oxygen pressure regulator/transmitter (4HT) (10).
5 TORQUE the union of the HP oxygen-replenishing hose (5767HM1) (1) to between 1.581 and 1.129 m.daN (139.91 and 99.91 lbf.in )

.
6 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(e) Install the HP oxygen-overpressure hose (5762HM1) (6).

1 Remove the BAG - VINYL from the disconnected end of the HP oxygen-overpressure hose (5762HM1) (6).
2 Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the HP oxygen-overpressure hose (5762HM1) (6).
3 Install a new AIPC 35-12-81-09-020 RING (5) on the HP oxygen-overpressure hose (5762HM1) (6).
4 Install the HP oxygen-overpressure hose (5762HM1) (6) on the oxygen pressure regulator/transmitter (4HT) (10).
5 TORQUE the union of the HP oxygen-overpressure hose (5762HM1) (6) to between 3.95 and 3.05 m.daN (29.13 and 22.49 lbf.ft )

.
6 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(f) Install the LP oxygen-supply hose (5763HM1) (7).

1 Remove the BAG - VINYL from the disconnected end of the LP oxygen-supply hose (5763HM1) (7).
2 Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the LP oxygen-supply hose (5763HM1) (7).
3 Install a new AIPC 35-12-81-09-010 RING (8) or AIPC 35-12-81-09-015 RING (8) on the LP oxygen-supply hose (5763HM1) (7).
4 Install the LP oxygen-supply hose (5763HM1) (7) on the oxygen pressure regulator/transmitter (4HT) (10).
5 TORQUE the union of the LP oxygen-supply hose (5763HM1) (7) to between 2.03 and 1.47 m.daN (14.97 and 10.84 lbf.ft )

.
6 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(g) Remove the CAP - BLANKING from the electrical connector (4HTA) (9).
(h) Connect the electrical connector (4HTA) (9) to the oxygen pressure regulator/transmitter (4HT) (10).
(3) FOR [5750HM2] (OXYGEN CYLINDER)
(a) Remove the stowage cap from the oxygen supply outlet (14) and put it in its bag.

NOTE: The stowage cap of the oxygen supply outlet (14) must be put in the bag attached to the valve assy of the crew oxygen-storage cylinder 5750HM2.

(b) Remove the oxygen pressure regulator/transmitter (4HT2) (20) from the BAG - VINYL, SEALED.
(c) Install the oxygen pressure regulator/transmitter (4HT2) (20).

1 Install the oxygen pressure regulator/transmitter (4HT2) (20) on the oxygen supply outlet (14).
2 TORQUE the nut (13) to between 8 and 7 m.daN (59.00 and 51.62 lbf.ft )

.
3 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(d) Install the HP oxygen-replenishing hose (5767HM2) (11).

1 Remove the BAG - VINYL from the disconnected end of the HP oxygen-replenishing hose (5767HM2) (11).
2 Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the HP oxygen-replenishing hose (5767HM2) (11).
3 Install a new AIPC 35-11-81-03-020 RING (12) on the HP oxygen-replenishing hose (5767HM2) (11).
4 Install the HP oxygen-replenishing hose (5767HM2) (11) on the oxygen pressure regulator/transmitter (4HT2) (20).
5 TORQUE the union of the HP oxygen-replenishing hose (5767HM2) (11) to between 1.581 and 1.129 m.daN (139.91 and 99.91 lbf.in )

.
6 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(e) Install the HP oxygen-overpressure hose (5762HM2) (16).

1 Remove the BAG - VINYL from the disconnected end of the HP oxygen-overpressure hose (5762HM2) (16).
2 Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the HP oxygen-overpressure hose (5762HM2) (16).
3 Install a new AIPC 35-12-81-11-010 RING (15) on the HP oxygen-overpressure hose (5762HM2) (16).
4 Install the HP oxygen-overpressure hose (5762HM2) (16) on the oxygen pressure regulator/transmitter (4HT2) (20).
5 TORQUE the union of the HP oxygen-overpressure hose (5762HM2) (16) to between 3.95 and 3.05 m.daN (29.13 and 22.49 lbf.ft )

.
6 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(f) Install the LP oxygen-supply hose (5763HM2) (17).

1 Remove the BAG - VINYL from the disconnected end of the LP oxygen-supply hose (5763HM2) (17).
2 Remove the PLUG - BLANKING, APPROVED FOR USE WITH OXYGEN from the LP oxygen-supply hose (5763HM2) (17).
3 Install a new AIPC 35-12-81-11-030 RING (18) on the LP oxygen-supply hose (5763HM2) (17).
4 Install the LP oxygen-supply hose (5763HM2) (17) on the oxygen pressure regulator/transmitter (4HT2) (20).
5 TORQUE the union of the LP oxygen-supply hose (5763HM2) (17) to between 2.03 and 1.47 m.daN (14.97 and 10.84 lbf.ft )

.
6 Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(g) Remove the CAP - BLANKING from the electrical connector (4HT2A) (19).
(h) Connect the electrical connector (4HT2A) (19) to the oxygen pressure regulator/transmitter (4HT2) (20).

Subtask 35-13-15-790-051-A ** ON A/C NOT FOR ALL

B. Leak Check
(1) Apply the solution Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the mechanical connections.
(2) Turn the manual shutoff valves.

CAUTION: TURN THE MANUAL SHUTOFF VALVES VERY SLOWLY ON ALL THE CREW OXYGEN-STORAGE CYLINDERS UNTIL THEY ARE FULLY OPEN. IF YOU TURN THE MANUAL SHUTOFF VALVES TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT.

CAUTION: TURN THE HANDVALVES ON ALL OXYGEN BOTTLES UNTIL THEY ARE FULLY OPEN. IF THE HANDVALVES ARE NOT FULLY OPEN BEFORE FLIGHT, IT IS POSSIBLE THAT THE OXYGEN PRESSURE DATA ON THE ECAM DOOR/OXY PAGE WILL NOT BE CORRECT.

(a) Turn the manual shutoff valves of the crew oxygen-storage cylinders 5750HM1 and 5750HM2 very slowly until they are fully open.
(3) Examine each connection to make sure that there are no leaks.
(4) Remove the solution Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the mechanical connections with a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 35-13-15-790-054-A ** ON A/C NOT FOR ALL

C. Leak Check of the Filling Line

Oxygen Filling Port ** ON A/C NOT FOR ALL

(1) FOR [4HT] (XMTR/PRESS REG-OXY)
(a) In the avionics compartment, make sure that:

The manual shutoff valve of crew oxygen-storage cylinder 5750HM1 is fully closed.
The WARNING NOTICE(S) is(are) in position to tell persons not to operate the manual shutoff valve of crew oxygen-storage cylinder 5750HM1.

(b) Remove the plug assembly (2) from the oxygen filling port (1) (5769HM1).
(c) Connect a NITROGEN COMPRESSED SOURCE - GROUND to the oxygen filling port (1) (5769HM1).
(d) Slowly pressurize the oxygen filling port (1) (5769HM1) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
(e) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen pressure regulator/transmitter (4HT) and the oxygen filling port (1) (5769HM1).
1 If you find leak(s), use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
2 Do a check of the torque(s) of the connection(s).
3 Slowly pressurize the oxygen filling port (1) (5769HM1) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
4 Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen pressure regulator/transmitter (4HT) and the oxygen filling port (1) (5769HM1).
(f) Remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the connections with a Textile-Lint free Cotton - (Material No.14SBA1) .
(g) Use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
(h) Remove the NITROGEN COMPRESSED SOURCE - GROUND from the oxygen filling port (1) (5769HM1).
(i) Install the plug assembly (2) on the oxygen filling port (1) (5769HM1).
(j) TORQUE the plug assembly (2) to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )

.
(k) Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(l) Open the manual shutoff valve.

CAUTION: WHEN YOU OPEN THE MANUAL SHUTOFF VALVE ON THE CREW OXYGEN-STORAGE CYLINDER, MAKE SURE THAT:

YOU TURN IT VERY SLOWLY
YOU TURN IT UNTIL IT IS FULLY OPEN.

IF YOU TURN THE MANUAL SHUTOFF VALVE TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT. IF THE MANUAL SHUTOFF VALVE IS NOT FULLY OPEN, THE OXYGEN PRESSURE DATA CAN BE INCORRECT.

1 Slowly and fully open the manual shutoff valve of the crew oxygen-storage cylinder (5750HM1).
(2) FOR [4HT2] (PRESS.TRANSM.REGULATO)
(a) In the avionics compartment, make sure that:

The manual shutoff valve of crew oxygen-storage cylinder 5750HM2 is fully closed.
The WARNING NOTICE(S) is(are) in position to tell persons not to operate the manual shutoff valve of crew oxygen-storage cylinder 5750HM2.

(b) Remove the plug assembly (2) from the oxygen filling port (1) (5769HM2).
(c) Connect a NITROGEN COMPRESSED SOURCE - GROUND to the oxygen filling port (1) (5769HM2).
(d) Slowly pressurize the oxygen filling port (1) (5769HM2) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
(e) Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen pressure regulator/transmitter (4HT2) and the oxygen filling port (1) (5769HM2).
1 If you find leak(s), use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
2 Do a check of the torque(s) of the connection(s).
3 Slowly pressurize the oxygen filling port (1) (5769HM2) with the NITROGEN COMPRESSED SOURCE - GROUND to 1850 psi (127.55 bar).
4 Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connections between the oxygen pressure regulator/transmitter (4HT2) and the oxygen filling port (1) (5769HM2).
(f) Remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the connections with a Textile-Lint free Cotton - (Material No.14SBA1) .
(g) Use the relief function of the NITROGEN COMPRESSED SOURCE - GROUND to release the pressure.
(h) Remove the NITROGEN COMPRESSED SOURCE - GROUND from the oxygen filling port (1) (5769HM2).
(i) Install the plug assembly (2) on the oxygen filling port (1) (5769HM2).
(j) TORQUE the plug assembly (2) to between 0.73 and 0.63 m.daN (64.60 and 55.75 lbf.in )

.
(k) Identify the tightened union nuts with a red line (Ref. AMM TASK 20-23-22-910-001).
(l) Open the manual shutoff valve.

CAUTION: WHEN YOU OPEN THE MANUAL SHUTOFF VALVE ON THE CREW OXYGEN-STORAGE CYLINDER, MAKE SURE THAT:

YOU TURN IT VERY SLOWLY
YOU TURN IT UNTIL IT IS FULLY OPEN.

IF YOU TURN THE MANUAL SHUTOFF VALVE TOO QUICKLY, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT. IF THE MANUAL SHUTOFF VALVE IS NOT FULLY OPEN, THE OXYGEN PRESSURE DATA CAN BE INCORRECT.

1 Slowly and fully open the manual shutoff valve of the crew oxygen-storage cylinder (5750HM2).

Subtask 35-13-15-865-057-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	OXYGEN/CREW/OXY/SPLY	1HT	HA01

Subtask 35-13-15-870-050-A ** ON A/C NOT FOR ALL

E. Bleeding of the Crew Oxygen System
(1) Do the bleeding of the crew oxygen system (Ref. AMM TASK 35-10-00-870-802).

Subtask 35-13-15-790-052-A ** ON A/C NOT FOR ALL

F. Operational test
(1) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).
(2) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Push the CREW SUPPLY pushbutton switch (the OFF legend goes off).

(3) On the lower ECAM DU, on the DOOR/OXY page, make sure that the two HP oxygen indications are shown in green.
(4) On the Captain oxygen-mask stowage-box, push and hold the PRESS TO TEST AND RESET control button.
At the same time, push and hold the PRESS TO TEST/EMERGENCY knob on the mask regulator.
(a) Keep the PRESS TO TEST AND RESET control button and the PRESS TO TEST/EMERGENCY knob pushed for a minimum of three seconds.
(b) Make sure that you can hear the volume of the sound of the oxygen flow.
(c) Release the PRESS TO TEST/EMERGENCY knob.
(d) Release the PRESS TO TEST AND RESET control button.
(e) Position of the PRESS TO TEST/EMERGENCY knob

WARNING: MAKE SURE THAT THE PRESS TO TEST/EMERGENCY KNOB IS NOT IN THE EMERGENCY POSITION. IF IT IS IN THE EMERGENCY POSITION, THERE CAN BE A LEAK OF OXYGEN.

1 Make sure that the PRESS TO TEST/EMERGENCY knob is not in the EMERGENCY position.
(5) On the First-Officer oxygen-mask stowage-box, push and hold the PRESS TO TEST AND RESET control button.
At the same time, push and hold the PRESS TO TEST/EMERGENCY knob on the mask regulator.
(a) Keep the PRESS TO TEST AND RESET control button and the PRESS TO TEST/EMERGENCY knob pushed for a minimum of three seconds.
(b) Make sure that you can hear the volume of the sound of the oxygen flow.
(c) Release the PRESS TO TEST/EMERGENCY knob.
(d) Release the PRESS TO TEST AND RESET control button.
(e) Position of the PRESS TO TEST/EMERGENCY knob

WARNING: MAKE SURE THAT THE PRESS TO TEST/EMERGENCY KNOB IS NOT IN THE EMERGENCY POSITION. IF IT IS IN THE EMERGENCY POSITION, THERE CAN BE A LEAK OF OXYGEN.

1 Make sure that the PRESS TO TEST/EMERGENCY knob is not in the EMERGENCY position.
(6) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Release the CREW SUPPLY pushbutton switch (the OFF legend comes on).

5. Close-up
Subtask 35-13-15-860-059-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Put the aircraft back to its initial configuration.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove all the fixtures, tools, test and support equipment used during this procedure.
(4) Remove the WARNING NOTICE(S).

Subtask 35-13-15-410-052-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close access door 812 (Ref. AMM TASK 52-41-00-410-002).
(2) Remove the access platform(s).

Subtask 35-13-15-410-053-A ** ON A/C NOT FOR ALL

C. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:04:35 UTC