Subtask 35-23-34-020-050
B. Removal of the Quantity Calculation and Control Unit (QCCU) (960WR) (Ref. Fig. 401/TASK 35-23-34-991-001)
(1)
Loosen the spring latches (4) and disconnect the electrical connectors (5).
(2)
Put CAP - BLANKING on the disconnected electrical connectors.
(3)
Remove the screws (2), the washers (1) and the QCCU (3).
Quantity Calculation and Control Unit
Figure 401/TASK 35-23-34-991-001
EFF : 401-499, 35-23-34 Page 404
Aug 01/05
CES
TASK 35-23-34-400-001
Installation of the Quantity Calculation and Control Unit (QCCU) (960WR)
1. Reason for the Job__________________
Self Explanatory
2. Job Set-up Information______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific access platform 1.6 m (5 ft. 3 in.)
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
25-55-12-000-003 Removal of the Sidewall Panels in the AFT Cargo Compartment - FR59/FR65
25-55-12-400-003 Installation 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
52-30-00-860-002 Close the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump
35-23-34-991-001 Fig. 401 3. Job Set-up
__________ Subtask 35-23-34-860-051
A. Aircraft Maintenance Configuration
(1)
Make sure that the ground service network is energized
(Ref. TASK 24-41-00-861-002).
(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 35-23-34-865-051
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 35-23-34-420-050
A. Installation of the Quantity Calculation and Control Unit (QCCU) (960WR) (Ref. Fig. 401/TASK 35-23-34-991-001)
(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 QCCU (3) in position and install the screws (2) and the washers (1).
(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 connectors (5) and lock them with the spring latches (4).
Subtask 35-23-34-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1WR, 2WR.
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