Installation of the Oxygen Mask

TASK 35-21-43-400-001-A
Installation of the Oxygen Mask

WARNING: UNEXPENDED OXYGEN GENERATORS CONTAIN A PYROTECHNIC- ACTIVATED IGNITION DEVICE. ENSURE THAT RELEASE PIN/OR SAFETY PIN WITH WARNING FLAG IS INSTALLED DURING HANDLING AND TRANSPORTATION. IF RELEASE PIN AND/OR SAFETY PIN IS PULLED AND GENERATOR FIRES, IMMEDIATELY PLACE ON A NON-COMBUSTIBLE SURFACE. CONTAINER SURFACE TEMPERATURES MAY EXCEED 450F. ALLOW 2 TO 3 HOURS COOLING TIME BEFORE HANDLING CONTAINERS.

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

WARNING: KEEP ALL HYDROCARBONS (FUELS, LUBRICANTS, ETC.) AWAY FROM ALL SOURCE OF OXYGEN. OXYGEN BECOMES EXPLOSIVE WHEN IT TOUCHES HYDROCARBONS.

ZONE: 200

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	CLAMPS
No specific	AR	WARNING NOTICE(S)
No specific	AR	WATER - DISTILLED

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
12	TIE	AIPC 35-21-41-19-090
12	TIE	AIPC 35-21-41-20-080
12	TIE	AIPC 35-21-41-42-030
12	TIE	AIPC 35-21-41-43-030
12	TIE	AIPC 35-21-41-44-030
12	TIE	AIPC 35-21-41-45-030

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 35-00-00-860-001-A	Special Precautions When Working on a Gaseous Oxygen System
TASK 35-21-43-550-801-A	Packing of the Oxygen Mask Assemblies
Emergency Oxygen Mask - Removal/Installation ** ON A/C NOT FOR ALL
Emergency Oxygen Mask - Removal/Installation ** ON A/C NOT FOR ALL
Emergency Oxygen Mask - Removal/Installation ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 35-21-43-860-050-A

A. Aircraft Maintenance Configuration
(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, make sure that the WARNING NOTICE(S) is(are) in position to tell persons not to operate the emergency oxygen system.
(4) Make sure that the door of the emergency oxygen container is open.

Subtask 35-21-43-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	OXYGEN/PASSENGER/ACTUATION	7WR	HA08
49VU	OXYGEN/PASSENGER/ACTUATION	6WR	HA07
49VU	OXYGEN/PASSENGER/ACTUATION	5WR	HA06
49VU	OXYGEN/PASSENGER/ACTUATION	4WR	HA05
49VU	OXYGEN/PASSENGER/CTL AND WARN	3WR	HA04
49VU	OXYGEN/PASSENGER/CTL AND WARN	2WR	HA03
49VU	OXYGEN/PASSENGER/CTL AND WARN	1WR	HA02

4. Procedure
Subtask 35-21-43-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Oxygen Mask in the Cabin

Emergency Oxygen Mask - Removal/Installation ** ON A/C NOT FOR ALL

CAUTION: DO NOT PULL THE MASK LANYARD FROM THE END WITH THE RELEASE PIN. IF YOU PULL ON THIS END OF THE LANYARD, YOU WILL REMOVE THE RELEASE PIN AND START A FLOW OF OXYGEN WHICH CANNOT BE STOPPED.

(1) Hold the outlet manifold (9) tightly during the installation of the oxygen supply hoses (10):

CAUTION: WHEN YOU INSTALL THE SUPPLY HOSES FOR THE OXYGEN MASKS ON THE MANIFOLD OUTLET, DO NOT APPLY FORCE LATERALLY TO THE OUTLET AXIS. THIS IS TO PREVENT DAMAGE TO THE MANIFOLD.

(a) Carefully push the oxygen supply hose (10) onto its related outlet (8).

NOTE: When the oxygen supply hose is installed correctly, the outlet of the manifold is fully retracted into the oxygen supply hose.

(b) For the emergency oxygen container P/N D(G/W)XXXXX series:
1 Safety the supply hoses (10) with the new AIPC 35-21-41-19-090 TIE (12) or AIPC 35-21-41-20-080 TIE (12) or AIPC 35-21-41-42-030 TIE (12) or AIPC 35-21-41-43-030 TIE (12) or AIPC 35-21-41-44-030 TIE (12) or AIPC 35-21-41-45-030 TIE (12).
(2) If the procedure is not related to the oxygen generator replacement:
(a) Connect the mask lanyard (4) with the snap hook (7) of related oxygen mask (5).
(b) If applicable, connect the pull flag(s) (6) to the snap hook(s) (7).

NOTE: The emergency oxygen containers with the pull flags are only installed in:

The entrance areas (cabin crew sitting or passenger standing)
The lavatories (passenger sitting or standing)
The sleeper seat (passengers sitting or lying)

NOTE: If only one pull flag is installed, connect it to the oxygen mask which is nearest to the actuation pin.

(c) For oxygen containers E1XXXX-series:
1 Connect each oxygen-generator release-lanyard (4) with the snap hook (7) of related oxygen mask (5).

NOTE: The oxygen-generator release-lanyards have a green color.

(d) Remove the safety ring with a warning flag (1):

WARNING: AFTER YOU INSTALL THE GENERATORS IN THE EMERGENCY OXYGEN CONTAINERS, REMOVE THE SAFETY RINGS OR SAFETY PINS FROM THE GENERATORS. IF YOU DO NOT REMOVE THEM, THE GENERATORS WILL NOT OPERATE.

1 Make sure that release pin (2) is correctly installed.
2 Carefully remove the safety ring with a warning flag (1).
(e) Put the mask assemblies (5) into the emergency oxygen containers (Ref. AMM TASK 35-21-43-550-801).

Subtask 35-21-43-420-050-C ** ON A/C NOT FOR ALL

A. Installation of the Oxygen Mask Assemblies

Emergency Oxygen Mask - Removal/Installation ** ON A/C NOT FOR ALL

(1) For 15-minutes oxygen generators P/N 6301200/300/400-series with metal outlets and without reinforced supply hoses ends:
(a) Preparation of the outlets (7) of the manifold (8):
1 Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
2 Apply distilled water with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlets (7) of the manifold (8).
3 Make sure that no water goes into the outlets.
(b) Hold the manifold (8) tightly during the installation of the supply hoses (6).

CAUTION: WHEN YOU INSTALL THE SUPPLY HOSES FOR THE OXYGEN MASKS ON THE MANIFOLD OUTLET, DO NOT APPLY FORCE LATERALLY TO THE OUTLET AXIS. THIS IS TO PREVENT DAMAGE TO THE MANIFOLD.

NOTE: When the oxygen supply hose is installed correctly, the outlet of the outlet manifold is fully retracted into the oxygen supply hose.

(d) Safety the supply hoses (6) with metal CLAMPS (5).
(2) For the 15-minutes oxygen generators P/N E63120/130/140/320/330/340-series with plastic outlets and reinforced supply hose ends:
(a) Preparation of the outlets (10) of the manifold (12):
1 Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
2 Apply distilled water with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlets (10) of the manifold (12).
3 Make sure that no water goes into the outlets.
(b) Carefully increase the temperature of the ends of the supply hoses (9) with hot WATER - DISTILLED.
1 Make sure that no water goes into the supply hoses.
(c) Hold the manifold (12) tightly during the installation of the supply hoses (9).

CAUTION: WHEN YOU INSTALL THE SUPPLY HOSES FOR THE OXYGEN MASKS ON THE MANIFOLD OUTLET, DO NOT APPLY FORCE LATERALLY TO THE OUTLET AXIS. THIS IS TO PREVENT DAMAGE TO THE MANIFOLD.

1 Carefully push each oxygen supply hose (9) onto its related outlet (10).

NOTE: When the oxygen supply hose is installed correctly, the outlet of the outlet manifold is fully retracted into the oxygen supply hose.

NOTE: The reinforced part of the supply hose must be at least 5 mm (0.1969 in.) longer than the related outlet.

(3) For the 22-minutes oxygen generators P/N E63220/230/240/420/430/440-series installed in oxygen containers 100/101-series:
(a) Preparation of the outlets (21) of the manifold (22):
1 Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
2 Apply distilled water with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlets (21) of the manifold (22).
3 Make sure that no water goes into the outlets.
(b) Hold the manifold (22) tightly during the installation of the supply hoses (19).

CAUTION: WHEN YOU INSTALL THE SUPPLY HOSES FOR THE OXYGEN MASKS ON THE MANIFOLD OUTLET, DO NOT APPLY FORCE LATERALLY TO THE OUTLET AXIS. THIS IS TO PREVENT DAMAGE TO THE MANIFOLD.

1 Carefully push each oxygen supply hose (19) onto its related outlet (21).

NOTE: When the oxygen supply hose is installed correctly, the outlet of the outlet manifold is fully retracted into the oxygen supply hose.

(c) Install the new cable ties (20) on the outlets (21).
(4) For the 22-minutes oxygen generators P/N 6302200/300/400-series with metal outlets and silicon high-temperature supply hoses:
(a) If the procedure is related to the oxygen generator replacement:
1 Preparation of the outlets (14) of the manifold (15):
a Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
b Apply distilled water with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlets (14) of the manifold (15).
c Make sure that no water goes into the outlets.
2 Carefully increase the temperature of the ends of the silicon high-temperature supply hoses (13) with hot WATER - DISTILLED.
3 Hold the manifold (15) tightly during the installation of the silicon high-temperature supply hoses (13).

CAUTION: WHEN YOU INSTALL THE SUPPLY HOSES FOR THE OXYGEN MASKS ON THE MANIFOLD OUTLET, DO NOT APPLY FORCE LATERALLY TO THE OUTLET AXIS. THIS IS TO PREVENT DAMAGE TO THE MANIFOLD.

a Carefully push each silicon high-temperature supply hose (13) on its related outlet (14).

NOTE: When the oxygen supply hose is installed correctly, the outlet of the outlet manifold is fully retracted into the oxygen supply hose.

(b) If the procedure is not related to the oxygen generator replacement:
1 Preparation of the connecting pieces (18):
a Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
b Apply distilled water with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlets of the connecting pieces (18).
c Make sure that no water goes into the outlets.
2 Hold the connecting piece (18) tightly during the installation of the supply hoses (16).
a Carefully push each supply hose (16) on its related connecting piece (18).

NOTE: When the oxygen supply hose is installed correctly, the outlet of the connecting piece is fully retracted into the oxygen supply hose.

(5) For the 22-minutes oxygen generators P/N E63220/230/240/420/430/440-series installed in the oxygen containers 000/003/004/005/009-series:
(a) If the procedure is related to the oxygen generator replacement:
1 Preparation of the outlets (27) of the manifold (29):
a Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
b Apply distilled water with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlets (27) of the manifold (29).
c Make sure that no water goes into the outlets.
2 Carefully increase the temperature of the ends of the silicon high-temperature supply hoses (30) with hot WATER - DISTILLED.
3 Hold the manifold (29) tightly during the installation of the silicon high-temperature supply hoses (30).

CAUTION: WHEN YOU INSTALL THE SUPPLY HOSES FOR THE OXYGEN MASKS ON THE MANIFOLD OUTLET, DO NOT APPLY FORCE LATERALLY TO THE OUTLET AXIS. THIS IS TO PREVENT DAMAGE TO THE MANIFOLD.

a Carefully push each silicon high-temperature supply hose (30) on its related outlet (27).

NOTE: When the oxygen supply hose is installed correctly, the outlet of the outlet manifold is fully retracted into the oxygen supply hose.

4 Install and tight new cable ties (28).
(b) If the procedure is not related to the oxygen generator replacement:
1 Preparation of the connecting pieces (31):
a Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
b Apply distilled water with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlets of the connecting pieces (31).
c Make sure that no water goes into the outlets.
2 Hold the connecting piece (31) tightly during the installation of the supply hoses (33).
a Carefully push each supply hose (33) on its related connecting piece (31).

NOTE: When the oxygen supply hose is installed correctly, the outlet of the connecting piece is fully retracted into the oxygen supply hose.

(6) If the procedure is not related to the oxygen generator replacement:
(a) Connect each mask lanyard (3) with its free loop end to the snap hook (24) of each mask (25).
(b) If applicable, connect the pull flag (23) to the snap hook (24) of each mask (25).

NOTE: The emergency oxygen containers with pull flags are only installed in:

The entrance areas (cabin crew sitting or passengers standing)
The lavatories (passengers sitting or standing)
The sleeper seat (passengers sitting or lying).

(c) For 22-minutes oxygen generators P/N E63420/430/440-series, installed in the I-type oxygen containers 100/101-series:
1 Connect each oxygen-generator release-lanyard (26) with the snap hook (24) of each mask (25).

NOTE: The oxygen-generator release lanyards have a green color.

(d) Install the release pin (2):

CAUTION: DO NOT PULL THE MASK LANYARD FROM THE END WITH THE RELEASE PIN. IF YOU PULL ON THIS END OF THE LANYARD, YOU WILL REMOVE THE RELEASE PIN AND START A FLOW OF OXYGEN WHICH CANNOT BE STOPPED.

1 Put the metallic ring of one mask lanyard (3) in the eyelet of release pin (2).
2 Install all the remaining mask lanyards (3) with the metallic ring on the release pin (2).
3 Push the release pin (2) through the hole behind the safety pin with the warning flag (1).
(e) Removal of the safety pin with a warning flag (1):

WARNING: AFTER YOU INSTALL THE GENERATORS IN THE EMERGENCY OXYGEN CONTAINERS, REMOVE THE SAFETY RINGS OR SAFETY PINS FROM THE GENERATORS. IF YOU DO NOT REMOVE THEM, THE GENERATORS WILL NOT OPERATE.

1 Carefully remove the safety pin with a warning flag (1) only, if the release pin (2) is installed.
(f) Put the oxygen mask assemblies (25) into the oxygen containers (Ref. AMM TASK 35-21-43-550-801).

Subtask 35-21-43-420-050-H ** ON A/C NOT FOR ALL

A. Installation of the Oxygen Mask

Emergency Oxygen Mask - Removal/Installation ** ON A/C NOT FOR ALL

(1) Prepare the outlet (9) of the manifold (11) as follows:
(a) Use WATER - DISTILLED to make the Textile-Lint free Cotton - (Material No.14SBA1) moist.
(b) Apply WATER - DISTILLED with the moist Textile-Lint free Cotton - (Material No.14SBA1) on the outlet (9) of the manifold (11).
(c) Make sure that no water goes into the outlet (9).
(2) Carefully increase the temperature of the end of the new supply hose (8) with hot WATER - DISTILLED.
(3) Make sure that no water goes into the supply hose (8).
(4) Hold the manifold (11) tightly during the installation of the supply hose (8).
(5) Put the supply hose (8) in position on the applicable outlet (9).

CAUTION: WHEN YOU INSTALL THE SUPPLY HOSES FOR THE OXYGEN MASKS ON THE MANIFOLD OUTLET, DO NOT APPLY FORCE LATERALLY TO THE OUTLET AXIS. THIS IS TO PREVENT DAMAGE TO THE MANIFOLD.

(6) Carefully push the supply hose (8) onto the outlet (9).

NOTE: When the supply hose (8) is installed correctly, the outlet (9) of the manifold (11) is fully retracted into the supply hose (8).

(7) Make sure that the reinforced part of the supply hose (8) is minimum 5 mm (0.20 in.) longer than the related outlet (9).
(8) Install a new cable tie (12) on the supply hose (8).
(9) If applicable, connect the pull flag (2) to the snap hook (4) of the oxygen mask (3).
(10) Connect the free loop end of the mask lanyard (1) to the snap hook (4) of the oxygen mask (3).

CAUTION: DO NOT PULL THE MASK LANYARD FROM THE END WITH THE RELEASE PIN. IF YOU PULL ON THIS END OF THE LANYARD, YOU WILL REMOVE THE RELEASE PIN AND START A FLOW OF OXYGEN WHICH CANNOT BE STOPPED.

(11) Install the release pin (5):
(a) If the mask lanyard (1) is removed from the eyelet of the release pin (5):
1 Put the ring of the mask lanyard (1) in the eyelet of the release pin (5).
2 Close the eyelet of the release pin (5).
(b) If the mask lanyard (1) is not removed from the eyelet of the release pin (5):
1 Put the ring of the mask lanyard (1) on the release pin (5).
(c) Install the release pin (5) into the applicable hole of the firing pin (6).
(12) Remove the safety pin with the warning flag (7):
(a) Make sure that the release pin (5) is correctly installed.
(b) Carefully remove and discard the safety pin with the warning flag (7).

WARNING: AFTER YOU INSTALL THE GENERATORS IN THE EMERGENCY OXYGEN CONTAINERS, REMOVE THE SAFETY RINGS OR SAFETY PINS FROM THE GENERATORS. IF YOU DO NOT REMOVE THEM, THE GENERATORS WILL NOT OPERATE.

(13) Put the oxygen mask (3) into the emergency oxygen container (Ref. AMM TASK 35-21-43-550-801).

Subtask 35-21-43-865-058-A

B. 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	OXYGEN/PASSENGER/ACTUATION	7WR	HA08
49VU	OXYGEN/PASSENGER/ACTUATION	6WR	HA07
49VU	OXYGEN/PASSENGER/ACTUATION	5WR	HA06
49VU	OXYGEN/PASSENGER/ACTUATION	4WR	HA05
49VU	OXYGEN/PASSENGER/CTL AND WARN	3WR	HA04
49VU	OXYGEN/PASSENGER/CTL AND WARN	2WR	HA03
49VU	OXYGEN/PASSENGER/CTL AND WARN	1WR	HA02

5. Close-up
Subtask 35-21-43-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.

Subtask 35-21-43-862-050-A

B. Put the aircraft back to its initial configuration.
(1) In the cockpit, on the OXYGEN section of overhead panel 21VU:
(a) Remove the WARNING NOTICE(S).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 12:36:53 UTC