Installation of the Full-Face/Quick-donning Oxygen-Mask

TASK 35-12-41-400-002-A
Installation of the Full-Face/Quick-donning Oxygen-Mask

WARNING: KEEP ALL HYDROCARBONS (FUELS, LUBRICANTS, ETC.) AWAY FROM ALL SOURCE 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 CAREFUL WHEN YOU DO MAINTENANCE OF THE FULL-FACE/QUICK-DONNING MASK(S). YOU CAN CAUSE DAMAGE TO THIS EQUIPMENT VERY EASILY IF YOU USE TOO MUCH FORCE OR THE INCORRECT CLEANING MATERIALS.

ZONE: 123
ZONE: 125
ZONE: 210
ZONE: 211
ZONE: 212
FIN: 5757HM
FIN: 5758HM
FIN: 5759HM
FIN: 5760HM

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)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.11CKA1)	Disinfectant and cleaner-Oxygen Mask - -
(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
125	LATERAL AVIONIC COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
211	COCKPIT
212	COCKPIT
812

D. Referenced Information

REFERENCE	DESIGNATION
TASK 23-51-00-710-004-A	Operational Test of the Oxygen Mask Microphone
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 35-00-00-860-001-A	Special Precautions When Working on a Gaseous Oxygen System
TASK 35-12-41-100-001-A	Cleaning of Oxygen Masks
TASK 35-12-41-100-802-A	Cleaning of the Full-Face/Quick-Donning Oxygen Mask on Aircraft
TASK 35-12-41-710-001-A	Operational Check of Flight Crew Oxygen System
Stowage of the Full-Face/Quick-Donning Oxygen Mask
Donning of the Full-Face/Quick-Donning Oxygen Mask

3. Job Set-up
Subtask 35-12-41-010-055-A ** ON A/C NOT FOR ALL

A. Get Access
(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 ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(3) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Make sure that the CREW SUPPLY pushbutton switch is released (OFF legend on).
Make sure that a WARNING NOTICE(S) is in position to tell persons not to push the CREW SUPPLY pushbutton switch.

(4) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the access door 812.
(5) Make sure that the access door 812 is open.
(6) Make sure that the valve of the oxygen cylinder (5750HM) is closed.
(7) Make sure that a WARNING NOTICE(S) is in position to tell persons not to open the valve of the oxygen cylinder (5750HM).

Subtask 35-12-41-010-055-B ** ON A/C NOT FOR ALL

Make sure that the CREW SUPPLY pushbutton switch is released (OFF legend on).
Make sure that a WARNING NOTICE(S) is in position to tell persons not to push the CREW SUPPLY pushbutton switch.

(4) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the access door 812.
(5) Make sure that the access door 812 is open.
(6) Make sure that the two manual-shutoff valves of the crew oxygen-storage cylinders (5750HM1 and 5750HM2) are closed.
(7) Make sure that a WARNING NOTICE(S) is in position to tell persons not to open the two manual-shutoff valves of the crew oxygen-storage cylinders (5750HM1 and 5750HM2).

Subtask 35-12-41-865-055-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/CREW/OXY/SPLY	1HT	HA01

4. Procedure
Subtask 35-12-41-670-055-A

A. Preparation before installation (oxygen masks MF10/MF20 series)

Stowage of the Full-Face/Quick-Donning Oxygen Mask

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) Remove the oxygen mask (3) from the BAG - VINYL.
(2) Make sure that there is no dirt or unwanted material on the interfaces between the oxygen mask (3) and the stowage box (8).
(3) Before you install the oxygen mask (3):
(a) Do a visual inspection of the oxygen mask (3) and make sure that it is serviceable.
(b) Remove the protective film from the internal and external surfaces of the oxygen mask window.
(c) Make sure that the oxygen mask (3) is clean. If not, clean it (Ref. AMM TASK 35-12-41-100-001) or (Ref. AMM TASK 35-12-41-100-802).

Subtask 35-12-41-420-054-B

B. Connection of the Full-Face/Quick-Donning Oxygen Mask (5757HM, 5758HM, 5759HM, 5760HM)

Stowage of the Full-Face/Quick-Donning Oxygen Mask

(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Remove the BAG-VINYL and then the PLUG-BLANKING, APPROVED FOR USE WITH OXYGEN from each disconnected line end.
(3) Connect the quick-disconnect coupling (7) to its oxygen receptacle (10).
(4) Remove the CAP-BLANKING from each electrical connector and receptacle.
(5) Connect the electrical microphone connector (13) to its receptacle (9).

Subtask 35-12-41-865-056-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	OXYGEN/CREW/OXY/SPLY	1HT	HA01

Subtask 35-12-41-860-057-A ** ON A/C NOT FOR ALL

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.

D. Prepare before test (oxygen masks MF10/MF20 series)

Stowage of the Full-Face/Quick-Donning Oxygen Mask ** ON A/C NOT FOR ALL

(1) In the avionics compartment, open the valve of the oxygen cylinder (5750HM):
(a) Slowly and lightly open the valve of the oxygen cylinder (5750HM) 3 to 4 turns.
(b) Let the pressure become stable (the pressure becomes stable after approximately 90 seconds).
(c) Fully open the valve of the oxygen cylinder (5750HM).
(2) In the cockpit, on the OXYGEN section of overhead panel 21VU:

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

(3) Make sure that the quick-disconnect coupling (7) has no leaks:

Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the quick-disconnect coupling (7).
Examine the connection for leaks.
When you are sure that there no leaks, remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the connection with Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 35-12-41-860-057-C ** ON A/C NOT FOR ALL

D. Prepare before test (oxygen masks MF10/MF20 series)

Stowage of the Full-Face/Quick-Donning Oxygen Mask ** ON A/C NOT FOR ALL

(1) In the avionics compartment, open the two manual-shutoff valves of the crew oxygen-storage cylinders (5750HM1 and 5750HM2).
(a) Slowly and fully open the two manual-shutoff valves of the crew oxygen-storage cylinders (5750HM1 and 5750HM2).
(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) Make sure that the quick-disconnect coupling (7) has no leaks:

Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the quick-disconnect coupling (7)
Examine the connection for leaks
When you are sure that there are no leaks, remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the connection with Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 35-12-41-710-051-A

E. Test

Donning of the Full-Face/Quick-Donning Oxygen Mask

(1) Do the operational check of the donning of the oxygen mask as follows:
(a) On the oxygen mask regulator (4), hold the red harness-inflation control-plates (5).
(b) Push the red harness-inflation control-plates (5) while the harness folds down.
(c) Examine the harness to make sure that there is no leak and it is in the correct condition.
(d) Turn the oxygen mask forward and hold the oxygen mask in front of your face.
(e) Put the harness over your head and move the oxygen mask with a wide arc from the forehead to the chin.
(f) Release the red harness-inflation control-plates (5) and put the oxygen mask to the face.
(g) Push the red harness-inflation control-plates (5) to inflate the harness again and adjust the oxygen mask as necessary to make sure that the oxygen mask is attached correctly on your face.
(2) Do the operational test of the oxygen mask microphone (Ref. AMM TASK 23-51-00-710-004).

Subtask 35-12-41-420-061-A

F. Installation of the Full-Face/Quick-Donning Oxygen Mask into the Stowage Box (oxygen masks MF10/MF20 series)

Stowage of the Full-Face/Quick-Donning Oxygen Mask

(1) Put the oxygen mask (3) in its stowage box (8) as follows:

WARNING: CAREFULLY OBEY THE PACKING INSTRUCTIONS TO MAKE SURE THAT THE OXYGEN MASK IS FULLY AVAILABLE AND IN THE CORRECT CONDITION IF THERE IS AN EMERGENCY.

(a) Make sure that the doors of the stowage box (8) are open.
(b) Make sure that the electrical and pneumatic connectors of the mask regulator are correctly connected to the stowage box receptacles.
(c) Make sure that the stowage box (8) is clean and clear of dust and water.
(d) Hold the oxygen mask (3) at its oxygen mask regulator (4).

NOTE: Do not press the red harness-inflation control-plates (5) on the oxygen mask regulator (4).

(e) Wind three-quarters of the full length of the microphone cable (12) and the oxygen flexible hose (6) in the "height figure" (as shown in the figure) and put them at the bottom of the stowage box (8).
(f) Apply only light force to press the stack of the microphone cable (12) and the oxygen flexible hose (6) down and make sure that it is not twisted.
(g) As necessary, turn the oxygen mask (3) to make sure that the oxygen flexible hose (6) is not twisted.
(h) Clean and disinfect the interior and the exterior of the oxygen mask face piece and the nose cup with Disinfectant and cleaner-Oxygen Mask - - (Material No.11CKA1) .
(i) During the stowage steps that follow, make sure that:

You do not put the inflatable harness (1) in the oxygen mask (3).
The coils of the microphone cable (12) and oxygen flexible hose (6) stay in position at the bottom of the stowage box (8).

NOTE: When you put the oxygen mask (3) in its stowage box (8), the harness upper spacer (2) and the harness lower spacer (11) can become caught on the oronasal cone. To prevent this, you must not put the inflatable harness (1) in the oxygen mask (3).

(j) Put the oxygen mask (3) in position above its stowage box (8).
(k) Put the harness lower spacer (11) against the upper part of the face piece of the oxygen mask (3).
(l) Push the back of the inflatable harness (1) in the stowage box (8).
(m) Keep the harness lower spacer (11) of the inflatable harness (1) against the upper part of the face piece when you put the oxygen mask (3) in the stowage box (8).
(n) With one hand, hold the harness lower spacer (11) to the top of the face piece. Hold the oxygen mask regulator (4) with the other hand.
(o) Put the remaining lengths of the microphone cable (12) and the oxygen flexible hose (6) in the stowage box (8).
(p) Put the oxygen flexible hose (6) down the center of the oxygen mask (3) to make sure of its correct alignment when the doors of the stowage box (8) are closed.
(q) Continue to put the oxygen mask assembly into the stowage box (8) while you maintain the centered position of the oxygen flexible hose (6).
(r) Make sure that the lens of the oxygen mask (3) do not rub against the stowage box (8).
(s) Put the oxygen mask (3) in the correct position in its stowage box (8) (the red harness-inflation control-plates (5) are up and the markings of the oxygen mask regulator (4) are in view).
(t) Put the oxygen mask regulator (4) in the correct position on its stop (14).
(u) Make sure that the locking tabs of the oxygen mask (3) are fully engaged with the box locking mechanism until tabs click on the stop (14).
(v) On the oxygen mask regulator (4):

Make sure that the N/100% dilution control is set to the 100% mode.
Make sure that the PRESS TO TEST/EMERGENCY KNOB is set to the normal mode (counter clockwise position).

(w) Close the doors of the stowage box (8). Make sure that the oxygen flexible hose (6) and the inflatable harness (1) are not caught in the doors of the stowage box (8).
(x) Make sure that the OXY ON flag (15) comes into view on the left door.
(y) On the left door of the stowage box (8), push and then release the PRESS TO TEST AND RESET control button (16).
(z) Make sure that the OXY ON flag (15) goes out of view.
(2) On the oxygen mask regulator (4), push and then release the PRESS TO TEST/EMERGENCY knob to make sure that the internal supply valve of the stowage box (8) is closed (the flow indicator of the stowage box (8) stays black).

If the flow indicator of the stowage box (8) turns yellow, check for oxygen leakage between the stowage box (8) and the oxygen mask (3).

(3) Do the operational test of the full-face/quick-donning oxygen mask (Ref. AMM TASK 35-12-41-710-001).
(4) 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 35-12-41-860-067-A

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Make sure that the OFF legend of the CREW SUPPLY pushbutton switch is on.

(3) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
(4) In the avionics compartment:

Remove the WARNING NOTICE(S).

(5) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Remove the WARNING NOTICE(S).

Subtask 35-12-41-410-054-A

B. Close Access
(1) Close access door 812.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 01:04:12 UTC