(2)
Make sure that a warning notice is in position in the cockpit to tell persons not to operate the emergency oxygen system.
(3)
Make sure that the access platform is in position at the AFT cargo-compartment door 826.
(4)
Make sure that the AFT cargo-compartment door 826 is open (Ref. TASK 52-30-00-860-001).
(5)
Make sure that the CARGO COMPT LIGHT switch 8LU is in the ON position.
(6)
Make sure that the related lining panel is removed (Ref. TASK 25-55-12-000-003).
(7)
Make sure that the manual shut-off valves of the emergency oxygen cylinders are close.
(8)
Obey the special precautions when you do this task (Ref. TASK 35-00-00-860-001).
Subtask 35-23-11-865-051
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU OXYGEN/PASSENGER/CTL AND WARN 2WR HA03 49VU OXYGEN/PASSENGER/CTL AND WARN 1WR HA02
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.
Subtask 35-23-11-420-050
A. Installation of the Temperature Transducer (975WR)
(Ref. Fig. 401/TASK 35-23-11-991-001)
(1)
Clean the component interface and/or the adjacent area.
(2)
Do an inspection of the component interface and/or the adjacent area.
(3)
Put the temperature transducer (2) in position and install the washers (4) and the screws (3).
(4)
Remove the blanking caps from the electrical connectors.
(5)
Make sure that the electrical connectors are clean and in the correct condition.
(6)
Connect the electrical connector 975WR-A (1).
(7)
If necessary, install the oxygen cylinder 991WR1 (Ref. TASK 35-21-51-400-001).
Subtask 35-23-11-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1WR, 2WR.
Subtask 35-23-11-710-050
C. Test of the Temperature Transducer (975WR)
(Ref. Fig. 402/TASK 35-23-11-991-002)
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the QCCU: On the QCCU:
-Examine the indicators on the - Make sure that there is no
QCCU. 'TEMPERATURE' indication.
2. On the QCCU: On the QCCU:
-Push the TEST pushbutton. - The COMPUTER, TEMPERATURE and
PRESSURE indicator come on.
Quantity Calculation and Control Unit
Figure 402/TASK 35-23-11-991-002
EFF : 401-499, 35-23-11 Page 408
Aug 01/05
CES
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
-On the display of the QCCU the indication '88' comes on.
On the QCCU, after 3 seconds:
-The COMPUTER, TEMPERATURE and PRESSURE indicator go off.
-
On the display of the QCCU the number of selected oxygen cylinders come on.
On the QCCU, after 12 seconds:
-
On the display of the QCCU the number of selected oxygen cylinders indication goes off.
Subtask 35-23-11-440-050
D. 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.
Subtask 35-23-11-942-050
E. Remove the warning notice(s).
5. Close-up
________
Subtask 35-23-11-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
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