(1)
Install the new washer (4) from the kit (1). NOTE : The yellow reflective surface must be on the outer side.
____
(2)
Install the new disc (3) from the kit (1). NOTE : The green reflective surface must be on the outer side.
____
(3)
Install the new circlip (2) from the kit (1).
NOTE : The flat edge must be on the outer side.
____ Subtask 35-21-54-440-050
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.
5. Close-up
________ Subtask 35-21-54-942-050
A. Remove the warning notice(s). Subtask 35-21-54-865-051
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1WR, 2WR.
Subtask 35-21-54-410-050
C. 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 35-21-54-862-050
D. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
OXYGEN DISTRIBUTION - DESCRIPTION AND OPERATION
_______________________________________________
1.
General
_______ When the oxygen distribution system operates it supplies each emergency oxygen container with oxygen from the oxygen storage system. It makes sure that sufficient oxygen is available for the passengers and cabin attendants, even if one of the supply lines is damaged.
2.
Component Location
__________________
(Ref. Fig. 001, 002, 003, 004, 005, 006)
-------------------------------------------------------------------------------
FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA
| | | | DOOR | REF. -------------------------------------------------------------------------------7501WR1 CHECK VALVE 131 35-22-63 7501WR2 CHECK VALVE 232 35-22-63 7503WR VALVE-BLEED/VENT 234 35-22-64 7504WR1 TEST PORT-OXYGEN 162 35-22-65 7504WR2 TEST PORT-OXYGEN 162 35-22-65 7504WR3 VALVE-BLEED/VENT 132 35-22-65 7514WR1 SOV-RISER LINE, FLOW EXCESS 131 35-22-62 7514WR2 SOV-RISER LINE, FLOW EXCESS 141 35-22-62 7514WR3 SOV-RISER LINE, FLOW EXCESS 152 35-22-62 7514WR4 SOV-RISER LINE, FLOW EXCESS 152 35-22-62 7550WR510 SOV-MAIN DISTRIBUTION, FLOWEXCESS 151 35-22-61 7553WR460 SOV-MAIN DISTRIBUTION, FLOWEXCESS 252 35-22-61
Container - Emergency Oxygen, Gaseous 200 35-22-54
3. System Description
__________________ The oxygen distribution system supplies emergency oxygen to each emergency oxygen container above the passenger seats, in the lavatories and at the cabin attendant stations. The system is only pressurized in case of emergency. Flexible hoses connect the emergency oxygen containers to the supply system. Low-pressure oxygen from the oxygen regulators is supplied to the two main supply lines. One line is installed below the cabin floor along the LH side of the aircraft. The other line is installed above the cabin ceiling. Riser lines or fall lines are installed at approximately every 4 fuselage frames to connect the overhead stowage distribution-lines to the main supply lines. The connections on the overhead stowage distribution-lines that connect the emergency oxygen containers are approximately 28 in. (0.7111 m) apart. The emergency oxygen containers for the lavatories and cabin attendant stations are connected to the distribution lines of the overhead stowages or to their own feeder lines.
Gaseous Oxygen Container - Location
Figure 001
EFF : 401-499, 35-22-00 Page 2
Aug 01/05
CES
Check Valve
Figure 002
EFF : 401-499, 35-22-00 Page 3
Aug 01/05
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Bleed/Vent Valve
Figure 003
EFF : 401-499, 35-22-00 Page 4
Aug 01/05
CES
Test Port
Figure 004
EFF : 401-499, 35-22-00 Page 5
Aug 01/05
CES
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