3. Job Set-up
__________ Subtask 35-23-54-861-050
A. Energize the ground service network
(Ref. TASK 24-42-00-861-001).
Subtask 35-23-54-865-050
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 35-23-54-941-050
C. Put a WARNING NOTICE in position in the cockpit to tell persons not to operate the emergency oxygen system.
Subtask 35-23-54-010-050
D. Get Access
(1)
Open the AFT cargo-compartment door 826 (Ref. TASK 52-30-00-860-001).
(2)
Put the access platform below the AFT cargo-compartment door 826.
(3)
Set the CARGO COMPT LIGHT switch 8LU to the ON position.
(4)
Remove the related lining panel to get access to the oxygen storage (Ref. TASK 25-55-12-000-003).
Subtask 35-23-54-614-050
E. Depressurize the Emergency Oxygen System
(1)
Close the manual shut-off valves of the emergency oxygen cylinders.
(2)
Put the TEST TOOL - MANUAL RELEASE on the oxygen test port 7504WR1 to release the pressure from the system.
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.
CAUTION : PUT DRY, CLEAN, METAL OR PLASTIC PLUGS ON ALL PIPES OR UNITS
_______ REMOVED TEMPORARILY. PUT EACH PIPE OR UNIT IN A SEALED VINYL BAG.
Subtask 35-23-54-860-050
A. Obey the special precautions when you do this task (Ref. TASK 35-00-00-860-001).
Subtask 35-23-54-020-050
B. Removal of the Low Pressure Switch (970WR)
(Ref. Fig. 401/TASK 35-23-54-991-001)
(1) Disconnection of the Electrical Connectors CAUTION : MAKE SURE THAT THE ELECTRICAL CONNECTOR(S) IS(ARE)
_______ DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).
(a)
Disconnect the electrical connector 970WR-A (3).
(b)
Put CAP - BLANKING on the disconnected electrical connectors.
(c)
Disconnect the bonding strap.
(2)
Loosen the nut (1) and remove the low pressure switch (2).
(3)
Put PLUG - BLANKING on the disconnected line ends.
(4)
Put the disconnected line ends into a sealed BAG - VINYL.
Low Pressure Switch (970WR)
Figure 401/TASK 35-23-54-991-001
EFF : 401-499, 35-23-54 Page 404
Aug 01/05
CES
TASK 35-23-54-400-001
Installation of the Low Pressure Switch (970WR)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
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