(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 35-21-51-614-050
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.
WARNING : SUPPORT THE UNIT/ASSEMBLY OR IT WILL FALL AND BECOME DAMAGED OR
_______
INJURE PERSONNEL. THE UNIT/ASSEMBLY IS HEAVY.
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 35-21-51-860-050
A. Obey the special precautions when you do this task (Ref. TASK 35-00-00-860-001).
Subtask 35-21-51-020-050
B. Removal of the Oxygen Cylinder Assemblies (991WR1-991WR6)
(Ref. Fig. 401/TASK 35-21-51-991-001)
(1)
FOR 991WR2, 991WR5
Remove the support brace C63.
(2)
Loosen the nut (6) and disconnect the pressure reducer (7).
(3)
Put PLUG - BLANKING on the disconnected line ends.
(4)
Put the disconnected line ends into a sealed BAG - VINYL.
(5)
Loosen the nut (5) and disconnect the hose (4).
(6)
Put PLUG - BLANKING on the disconnected line ends.
(7)
Put the disconnected line ends into a sealed BAG - VINYL.
(8)
Remove the nuts (3) and open the clamps (1).
(9)
Carefully lift and remove the oxygen cylinder (2).
Oxygen Cylinder Assemblies (991WR1-991WR6)
Figure 401/TASK 35-21-51-991-001
CES TASK 35-21-51-400-001
Installation of the Oxygen Cylinder Assemblies (991WR1-991WR6)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific lint-free cloth No specific access platform 1.6 m (5 ft. 3 in.) No specific Torque Wrench : range 0.00 to 1.20 m.daN
(0.00 to 9.00 lbf.ft) No specific Torque Wrench : range 0.20 to 3.60 m.daN
(2.00 to 26.00 lbf.ft) No specific Torque Wrench : range 1.00 to 10.00 m.daN
(8.00 to 75.00 lbf.ft)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 05-004 USA MIL-L-25567 TYPE I OXYGEN LEAK DETECTOR (Ref. 20-31-00)
C. 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
35-21-00-614-002 Filling of the Passenger Oxygen Cylinders
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
35-21-51-991-001 Fig. 401
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