E. Pressurize the Emergency Oxygen System
 (1)
 Slowly open the manual shut-off valves of the emergency oxygen cylinders 3.5 to 4 turns.

 (2)
 Let the pressure become stable.
 NOTE : This occurs after approximately 90 seconds.

____

 (3)
 Fully open the manual shut-off valves of the emergency oxygen cylinders.

 (4)
 If necessary, fill the emergency oxygen cylinders (Ref. TASK 35-21-00-614-001).

 Subtask 35-23-51-942-050
 F. Remove the warning notice(s).
 5. Close-up
________ Subtask 35-23-51-410-050
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the related lining panel to close access to the oxygen storage (Ref. TASK 25-55-12-400-003).

 (3)
 Set the CARGO COMPT LIGHT switch 8LU to the OFF position.

 (4)
 Remove the access platform(s).

 (5)
 Close the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-002).

 Subtask 35-23-51-862-050
 B. De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 REGULATOR - OXYGEN (910WR1,910WR2) - REMOVAL/INSTALLATION
_________________________________________________________
 TASK 35-23-52-000-001
 Removal of the Oxygen Regulator (910WR1/910WR2)
 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) No specific TEST TOOL - MANUAL RELEASE No specific access platform 1.6 m (5 ft. 3 in.) No specific 1 BAG - VINYL No specific 1 CAP - BLANKING No specific 1 PLUG - BLANKING No specific 1 WARNING NOTICE
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 25-55-12-000-003 Removal of the Sidewall Panels in the AFT Cargo Compartment - FR59/FR65 35-00-00-860-001 Special precautions when working on a Gaseous Oxygen System 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump 35-23-52-991-001 Fig. 401

 3. Job Set-up
__________ Subtask 35-23-52-861-050
 A. Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 Subtask 35-23-52-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU OXYGEN/PASSENGER/CTL AND WARN 2WR HA03 49VU OXYGEN/PASSENGER/CTL AND WARN 1WR HA02
 Subtask 35-23-52-941-050
 C. Put a WARNING NOTICE in position in the cockpit to tell persons not to operate the emergency oxygen system.
 Subtask 35-23-52-010-050
 D. Get Access
 (1)
 Open the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-001).

 (2)
 Put the access platform below the AFT cargo-compartment door 826.

 (3)
 Set the CARGO COMPT LIGHT switch 8LU to the ON position.

 (4)
 Remove the related lining panel to get access to the oxygen storage (Ref. TASK 25-55-12-000-003).

 Subtask 35-23-52-614-050
 E. Depressurize the Emergency Oxygen System
 (1)
 Close the manual shut-off valves of the emergency oxygen cylinders.

 (2)
 Put the TEST TOOL - MANUAL RELEASE on the oxygen test port 7504WR1 to release the pressure from the system.

 4. Procedure
_________
 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 : PUT DRY, CLEAN, METAL OR PLASTIC PLUGS ON ALL PIPES OR UNITS
　
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