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A
747-400
MAINTENANCE MANUAL
3. Protective Breathing Equipment (Fig. 1)
______________________________
A. The protective breathing equipment is comprised of a loose-fitting, universal sized hood with a demand based chemical air regeneration system. The hood also contains a speaking diaphragm with an oronasal mask cone. The hood is vacuum sealed for long storage life and is installed in a protective container.
B. The breathing equipment is totally self-contained and provides a 15-minute supply of oxygen. The breathing equipment is intended for one time use only and is not rechargeable.
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35-31-00
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747-400 FAULT ISOLATION/MAINT MANUAL
PORTABLE OXYGEN EQUIPMENT
COMPONENT FIG. 102 SHT QTY ACCESS/AREA AMM REFERENCE
MASK - OXYGEN EQUIPMENT - PROTECTIVE BREATHING CYLINDER - PORTABLE OXYGEN, PASSENGER 1 1 1 1 1 1 THE UPPER DECK THE UPPER DECK ATTACHED TO EACH PORTABLE OXYGEN CYLINDER 35-31-00 35-31-00 35-31-00
THE NUMBER OF PORTABLE OXYGEN CYLINDERS CAN CHANGE
Portable Oxygen Equipment - Component Index
Figure 101
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A
747-400 FAULT ISOLATION/MAINT MANUAL
PROTECTIVE BREATHING EQUIPMENT SEE
SHT 2
UPPER DECK
OXYGEN CYLINDER
(EXAMPLE)
Portable Oxygen Equipment - Component Location
Figure 102 (Sheet 1)
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C30191
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747-400
FAULT ISOLATION/MAINT MANUAL
LATCH SHROUD ASSEMBLY WINDOWMOUNTING BRACKET
OXYGEN
LATCH
CYLINDERS FACE MASK (MAIN DECK CYLINDERS)
OXYGEN
CYLINDER
MOUNTING BRACKET PANEL ASSEMBLY
BRACKET
OXYGEN CYLINDER
ASSEMBLY
OXYGEN CYLINDER (EXAMPLE)
(EXAMPLE)
B1
A
CONTAINER LIFE SUPPORT PACK
HOOD
VIEWPORT
EMERGENCY ESCAPE BREATHING DEVICE
C
THE NUMBER OF CYLINDERS CAN CHANGE1
Portable Oxygen Equipment - Component Location (Details from Sht 1) Figure 102 (Sheet 2)
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747-400 MAINTENANCE MANUAL
PORTABLE OXYGEN EQUIPMENT - ADJUSTMENT/TEST
___________________________________________
1. General_______
A. This procedure has this task:
(1) Portable oxygen cylinder pressure test.
B. The portable oxygen cylinders are installed at different locations.
C. Do not try to adjust a unit in the field. Send the unit to an approved overhaul depot if it does not operate correctly.
TASK 35-31-00-705-001
2. Portable Oxygen Cylinder Pressure Test (Fig. 501, 502)______________________________________
A. General
(1) This procedure is used to determine the proper function of the constant and demand flow regulators and their related outlet assemblies.
B. Standard Tools and Equipment
(1)
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