Removal of Oxygen Masks from Decentralized Gaseous-Oxygen Container in the Lavatories

TASK 35-21-43-000-802-A
Removal of Oxygen Masks from Decentralized Gaseous-Oxygen Container in the Lavatories

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: MAKE SURE THAT YOU OBEY THE MANUFACTURER'S INSTRUCTIONS AND NATIONAL HAZARDOUS MATERIAL REGULATIONS WHEN YOU MOVE OR KEEP THIS EQUIPMENT IN STORAGE:

CHEMICAL OXYGEN GENERATORS
PROTECTIVE BREATHING EQUIPMENT
FIXED AND PORTABLE OXYGEN CYLINDERS.

SPECIAL PRECAUTIONS ARE NECESSARY FOR THIS EQUIPMENT.

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.

CAUTION: PUT DRY AND CLEAN METAL OR PLASTIC PLUGS ON ALL PIPES OR UNITS THAT YOU REMOVE TEMPORARILY. THEN PUT EACH PIPE OR UNIT IN A SEALED VINYL BAG. IF YOU DO NOT OBEY THESE INSTRUCTIONS, CONTAMINATION OF THE OXYGEN SYSTEM CAN OCCUR.

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	1	CUTTER - THIN BLADE
No specific	1	GLOVES - COTTON, LINT-FREE, CLEAN
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
995000-00	1	TOOL-MANUAL RELEASE

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
8	RING	AIPC 35-22-54-99-010
8	RING	AIPC 35-22-89-99-010

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 35-00-00-860-001-A	Special Precautions When Working on a Gaseous Oxygen System
TASK 35-21-41-000-001-A	Removal of the Emergency Oxygen Containers
Emergency Oxygen Mask - Removal/Installation

3. Job Set-up
Subtask 35-21-43-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Obey the special precautions when you do work on gaseous oxygen system (Ref. AMM TASK 35-00-00-860-001).
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) In the cockpit, on the OXYGEN section of overhead panel 21VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to operate the emergency oxygen system.

Subtask 35-21-43-865-059-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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

Subtask 35-21-43-010-053-A ** ON A/C NOT FOR ALL

C. Get Access

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

(1) Remove the related oxygen container (10) from the lavatory (Ref. AMM TASK 35-21-41-000-001).
(2) Put the oxygen container (10) on a flat surface with clean and soft Textile-Lint free Cotton - (Material No.14SBA1) .
(a) Make sure that the oxygen container door (13) is on top of the oxygen container (10).
(b) Make sure that the test button (14) is in rest position.
(3) Put the 995000-00 TOOL-MANUAL RELEASE into the access hole (15) of the oxygen container door (13).

NOTE: It is permitted to use alternative tool P/N 995000.

(4) Push the 995000-00 TOOL-MANUAL RELEASE until the latch releases.
(5) Hold the oxygen container door (13) and carefully open it until the ejector strip (11) is fully extended.

4. Procedure
Subtask 35-21-43-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Oxygen Mask Assemblies

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) Use GLOVES - COTTON, LINT-FREE, CLEAN when you work on the oxygen system.
(2) Carefully remove the oxygen mask assemblies (1) from the oxygen container (10).
(3) Remove the ejector strip (11) from the slot of the oxygen container (10). Do not remove the ejector strip (11) from the slot of oxygen container door (13).
(4) Installation of the AIPC 35-22-54-99-010 RING (8) or AIPC 35-22-89-99-010 RING (8):
(a) Install the safety pin with the warning flag (8) in the hole (2) of the actuator housing (12).
(b) Close the safety pin with the warning flag (8).
(5) Remove the release pin (7) with a mask lanyards (4) from the actuator housing (12).

NOTE: With the safety pin installed you can remove the release pin. No oxygen flow can occur then.

(6) Open the eye of the release pin (7) and remove the mask lanyard (4).
(7) Remove the remaining mask lanyard (4) from the release pin (7).
(8) If applicable, disconnect the red flag 'PULL' (16) from the snap hook of the oxygen mask lanyard (4).
(9) Remove the supply hoses (3) from the manifold outlets (5):
(a) Use a CUTTER - THIN BLADE to carefully cut the end of the supply hoses (3) directly behind the recess (9) of the manifold outlets (5). Do not cut the manifold outlets (5).
(b) Hold the manifold (6) tightly and carefully remove the supply hoses (3) from manifold outlets (5).
(c) Carefully cut and discard the remaining parts of the supply hoses (3). Do not cut the manifold outlets (5).

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