(2)
Install the cap on the oxygen test port 7504WR2.
(3)
Remove the vinyl bags from the disconnected line ends.
(4)
Remove the blanking plugs from the disconnected line ends.
(5)
Connect the distribution system lines to the oxygen regulators 910WR1 and 910WR2.
(6)
TORQUE the connections to between 5.20 and 5.65 m.daN (38.34 and
41.66 lbf.ft).
(7)
Make sure that the work area is clean and clear of tool(s) and other items.
(8)
In the cabin, remove the blanking cap from the bleed vent valve 7503WR.
5. Close-up
________ Subtask 35-23-00-865-065
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1WR, 2WR.
Subtask 35-23-00-170-050
B. Flush the Oxygen Distribution System
(1)
Pressurize the Emergency Oxygen System:
(a)
Slowly open the manual shut-off valves of the emergency oxygen cylinders 3.5 to 4 turns.
(b)
Let the pressure become stable. NOTE : This occurs after approximately 90 seconds.
____
(c)
Fully open the manual shut-off valves of the emergency oxygen cylinders.
(2)
Push the MASK MAN ON pushbutton switch 14WR on the overhead panel 21VU.
(3)
Push the RESET pushbutton 13WR on the maintenance panel 50VU.
(4)
Put the DEPRESSURIZATION TOOL (P/N 4421072) on the oxygen test ports 7504WR2 and 7504WR3 to release the pressure from the oxygen distribution system.
(5)
Remove the DEPRESSURIZATION TOOL from the applicable oxygen test port 7504WR when the pressure is released.
(6)
Close all the doors of the emergency oxygen containers.
NOTE : The test levers must stay in the test position.
____
(7) Do the steps (2) thru (4) again. Subtask 35-23-00-614-050
C. Pressurize the Emergency Oxygen System
(1) If necessary, fill the emergency oxygen cylinders (Ref. TASK 35-21-00-614-001).
Subtask 35-23-00-942-054
D. Put the aircraft back to its initial configuration.
(1)
Remove the warning notice(s).
(2)
Put the emergency oxygen container back to its initial configuration
(a)
Close all the doors of the emergency oxygen containers.
(b)
Push the test lever back to the normal position and let them retract into their containers.
NOTE : Spring tension retracts the door stops automatically when
____ they are in the normal position.
Subtask 35-23-00-410-058
E. Close Access
(1)
In the cabin, install the ceiling panel 231CC (Ref. TASK 25-23-41-400-001).
(2)
Make sure that the work area is clean and clear of tool(s) and other items.
(3)
Install the related lining panel to close access to the oxygen storage (Ref. TASK 25-55-12-400-003).
(4)
Set the CARGO COMPT LIGHT switch 8LU to the OFF position.
(5)
Remove the access platform(s).
(6)
Close the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-002).
Subtask 35-23-00-862-056
F. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
TASK 35-23-00-720-004 Remove for Functional Check of Pressure Regulators
1.
Reason for the Job
__________________
Refer to the MPD TASK: 352001-04
2.
Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
35-23-52-000-001 Removal of the Oxygen Regulator (910WR1/910WR2) 35-23-52-400-001 Installation of the Oxygen Regulator (910WR1/910WR2) CMM 351096
3. Job Set-up
__________ Subtask 35-23-00-010-061
A. Remove the oxygen regulators (Ref. TASK 35-23-52-000-001).
4. Procedure
_________ Subtask 35-23-00-720-055
A. Do the functional check of the oxygen regulators refer to the CMM (Ref. CMM 351096).
5. Close-up
________ Subtask 35-23-00-410-060
A. Install the oxygen regulators (Ref. TASK 35-23-52-400-001).
TASK 35-23-00-720-005
Remove for Functional Check of Pressure Relief Valve, Main Distribution Shutoff Valves, Riser Line Shutoff Valves and Operational Check of Check Valves
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