2. On the QCCU: On the QCCU:
-Push the TEST pushbutton. - The COMPUTER, TEMPERATURE and
PRESSURE indicator come on.
-------------------------------------------------------------------------------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 35-23-34-440-050
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 35-23-34-942-050
E. Remove the warning notice(s).
5. Close-up
________
Subtask 35-23-34-410-050
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 35-23-34-862-050
B. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
REDUCER - PRESSURE (990WR1,990WR2,990WR3,990WR4,990WR5,990WR6)
______________________________________________________________ REMOVAL/INSTALLATION
____________________
TASK 35-23-51-000-001
Removal of the Pressure Reducer (990WR1-990WR6)
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 35-23-51-991-001 Fig. 401
3. Job Set-up
__________ Subtask 35-23-51-861-050
A. Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
Subtask 35-23-51-865-050
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 35-23-51-941-050
C. Put a WARNING NOTICE in position in the cockpit to tell persons not to operate the emergency oxygen system.
Subtask 35-23-51-010-050
D. Get Access
(1)
Open the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-001).
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