A. Make sure that the work area is clean and clear of tool(s) and other items.
 Subtask 35-21-42-862-050
 B. De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 EFF : ALL

35-21-42Page 408

 TASK 35-21-42-100-001 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.

 CAUTION : DO NOT PULL THE GENERATOR-END OF THE LANYARD.
_______
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
R  No specific 1 BRUSH - BRISTLED, SOFT 995000 1 TOOL - MANUAL RELEASE
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 11-007
 CLEANING, OXYGEN MASKS (Ref. 20-31-00) R Material No. 19-003 USA AMS 3819 R LINT-FREE COTTON CLOTH (Ref. 20-31-00)
 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
35-23-00-550-001 Packing of the Oxygen Masks
 EFF : ALL

35-21-42Page 409

 3. Job Set-up__________
 Subtask 35-21-42-910-051
 A. Preparation for Cleaning
 (1) Put the TOOL - MANUAL RELEASE into the access hole in the applicable door.
 (2) Push the tool in until the latch is released. The door opens and the masks fall out.
R R  (3) Prepare the cleaning solution: - Mix 1.5cc (0.91in3) of the CLEANING AGENTS (Material No. 11-007) with 4 liters (1.05USgal) of clean water.
 4. Procedure_________
 Subtask 35-21-42-110-051
 A. Cleaning of the mask, the harness and the mask stowage box
 CAUTION : DO NOT PULL THE GENERATOR-END OF THE LANYARD._______ 
R R  (1) Clean the mask and the harness with the cleaning solution and a BRUSH - BRISTLED, SOFT or a cloth. 
R R  (2) Flush with clean water. Rub with MISCELLANEOUS (Material No. 19-003) and let the mask dry in the air. 
R  (3) Clean the stowage box with MISCELLANEOUS (Material No. 19-003).
 5. Close-up________
 Subtask 35-21-42-420-054
 A. Put the aircraft back to its initial configuration. Install the Passenger Oxygen Mask(Ref. TASK 35-23-00-550-001)

35-21-42Page 410
Feb 01/03

 MASK - EMERGENCY OXYGEN - REMOVAL/INSTALLATION
______________________________________________
 TASK 35-21-43-000-001 Removal of the Oxygen Mask
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s) 995000 1 TOOL - MANUAL RELEASE
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002  Energize the Aircraft Electrical Circuits from the External Power 35-21-43-991-001 Fig. 401
 3. Job Set-up
__________ Subtask 35-21-43-861-050
 A. Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 EFF : ALL

35-21-43Page 401

 Subtask 35-21-43-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU OXYGEN/PASSENGER/ACTUATION 7WR HA08 49VU OXYGEN/PASSENGER/ACTUATION 6WR HA07 49VU OXYGEN/PASSENGER/ACTUATION 5WR HA06 49VU OXYGEN/PASSENGER/ACTUATION 4WR HA05
　
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