Cleaning of the Passenger Oxygen Mask

TASK 35-21-43-100-001-A
Cleaning of the Passenger 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: 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. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	BRUSH - BRISTLED, SOFT
995000-00	1	TOOL-MANUAL RELEASE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.11CKA1)	Disinfectant and cleaner-Oxygen Mask - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 35-21-43-550-801-A	Packing of the Oxygen Mask Assemblies

3. Job Set-up
Subtask 35-21-43-910-050-A

A. Preparation for Cleaning
(1) Put the 995000-00 TOOL-MANUAL RELEASE into the access hole in the applicable door.

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

(2) Push the tool in until the latch is released. The door opens and the masks fall out.
(3) Prepare the cleaning solution:

Mix 1.5cc (0.91in3) of the Disinfectant and cleaner-Oxygen Mask - - (Material No.11CKA1) with 4 liters (1.05USgal) of clean water.

4. Procedure
Subtask 35-21-43-110-050-A

A. Cleaning of the mask, the harness and the mask stowage box

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) Clean the mask and the harness with the cleaning solution and a BRUSH - BRISTLED, SOFT or a cloth.
(2) Flush with clean water. Rub with Textile-Lint free Cotton - (Material No.14SBA1) and let the mask dry in the air.
(3) Clean the stowage box with Textile-Lint free Cotton - (Material No.14SBA1) .

5. Close-up
Subtask 35-21-43-420-051-A

A. Put the aircraft back to its initial configuration.
(1) Install the passenger oxygen mask (Ref. AMM TASK 35-21-43-550-801).

[Rev.10 from 2021] 2026.04.01 01:05:07 UTC