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OXYGEN - INTRODUCTION
EFFECTIVITY
GUN ALL 35-00-00
Page 3
D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-00-00-201
Purpose
The flight crew oxygen system supplies the flight crew with low
pressure gaseous oxygen.
General Description
High pressure gaseous oxygen is stored in a cylinder.
Over pressure devices protect the cylinder. A green plastic
discharge indication disk on the fuselage skin shows cylinder
discharge from overpressure (when the disk is missing).
A cylinder head assembly connects the cylinder to the airplane
distribution system.
The oxygen supply lines are made of seamless stainless steel
tubing and use flareless fittings.
The flight crew masks supply the oxygen to the crew. The
masks have diluter-demand regulators and controls. The masks
are modular, independently adjustable, and easy to put on.
GUN 001-099, 201-999
When cylinder pressure is too low for operational requirements,
you replace it.
GUN 101-118
When cylinder pressure is too low for operational requirements,
you replace it or refill it from remote fill panel.
GUN ALL
Location
These system components are in the EE compartment:
* High pressure oxygen cylinder
* Cylinder head assembly
* Overpressure discharge tubing.
Training Information Point
Oxygen system maintenance requires special care and
cleanliness. Oxygen system maintenance personnel should
know the special materials and procedures used in system
servicing. Refer to chapter 12 of the maintenance manual for
these materials and procedures.
Keep oxygen systems clean and dry. Use approved cleaning
materials.
OXYGEN - CREW - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 35-10-00
Page 1
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-10-00-202
WARNING: DO NOT ALLOW OIL, GREASE, DIRT OR OTHER
FLAMMABLE MATERIALS TO TOUCH OXYGEN
SYSTEM COMPONENTS. THESE MATERIALS
WHEN EXPOSED TO PRESSURIZED OXYGEN
CAN IGNITE AND CAUSE AN EXPLOSION. A FIRE
OR EXPLOSION CAN CAUSE INJURY TO
PERSONS AND DAMAGE TO EQUIPMENT.
OXYGEN - CREW - GENERAL DESCRIPTION
EFFECTIVITY
GUN ALL 35-10-00
Page 2
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-10-00-202
OXYGEN - CREW - GENERAL DESCRIPTION
OXYGEN - CREW - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-099 35-10-00
Page 3
D633A101-GUN Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-10-00-202
OXYGEN - CREW - GENERAL DESCRIPTION
OXYGEN - CREW - GENERAL DESCRIPTION
EFFECTIVITY
GUN 201-999 35-10-00
Page 4
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-10-00-202
OXYGEN - CREW - GENERAL DESCRIPTION
OXYGEN - CREW - GENERAL DESCRIPTION
EFFECTIVITY
GUN 101-118 35-10-00
Page 5
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-10-00-202
Purpose
The flight crew oxygen system has these interfaces:
* System supply tubing
* Pressure indication
* Overpressure discharge and indication
* Flight crew communications system
GUN 101-118
* Connection from remote fill panel
GUN ALL
* Shutoff valve.
System Plumbing
The system plumbing has these components:
* Corrosion resistant, seamless, stainless steel tubing
* Flareless fittings
* Bayonet-type quick-disconnect connectors
* Flexible silicon rubber hoses with braided sheathing.
Shutoff Valves
A shutoff valve on the cylinder head opens or closes the
cylinder to the supply system.
Pressure Indication
A mechanical pressure gage on the oxygen cylinder shows the
cylinder pressure. The gage shows pressure regardless of the
cylinder shutoff valve position.
A pressure transducer on the cylinder coupling supplies a
signal to the pressure gage in the flight compartment.
Overpressure Discharge and Indication
A frangible (breakable) disk on the oxygen cylinder protects the
cylinder from overpressure. If an overpressure condition
　
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