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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-30-00-219
OXYGEN - PORTABLE - INTRODUCTION
OXYGEN - PORTABLE - INTRODUCTION
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-30-00-219
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OXYGEN - PORTABLE - INTRODUCTION
35-30-00
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
Portable oxygen cylinders supply oxygen for walk around First
Aid, emergency, and sustaining purposes.
Physical Description
The portable oxygen cylinders have these features:
* Identifying placards
* A high pressure oxygen cylinder
* A cylinder pressure gage
* An ON/OFF shutoff valve
* A pressure regulator
* Constant flow mask outlets
* A charging valve
* Safety relief devices
* An oxygen mask and hose
* A carrying strap.
Location
The portable oxygen cylinders are installed at easily reached
locations throughout the airplane.
Functional Description
The portable oxygen cylinders are steel pressure vessels. They
are charged with dry aviation grade oxygen to a nominal
pressure of 1,800 psig at 70F (21C).
A gage shows the bottle pressure. Nominal bottle pressure is
1,800 psig at 70F (21C).
The cylinder head components control and regulate oxygen
flow to the attached mask(s).
The cylinder head fixture has these fail safe devices:
* A thermal/frangible overpressure relief plug. This device
vents the contents of the bottle before a dangerous pressure
can build up.
* A relief valve. This valve is installed in the low pressure
portion of the regulator and prevents excessive pressure
downstream of the regulator.
When the shutoff valve is ON (open), the cylinder supplies
oxygen to two constant flow outlets. The outlet fittings have
glass cord metering devices and check valves. The check
valves are unseated by the mask connector to allow flow when
a mask is connected. The outlets use standard bayonet type
fittings.
Operational Controls
The cylinder shutoff valve requires user action. The shutoff
valve is turned clockwise to OFF during storage. It is turned
counterclockwise to ON during use and filling operations.
The mask hose must be plugged in to allow flow to the mask.
OXYGEN - PORTABLE - PORTABLE OXYGEN CYLINDER
EFFECTIVITY
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-30-00-220
Other control and safety features are automatic.
OXYGEN - PORTABLE - PORTABLE OXYGEN CYLINDER
EFFECTIVITY
GUN ALL 35-30-00
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-30-00-220
OXYGEN - PORTABLE - PORTABLE OXYGEN CYLINDER
OXYGEN - PORTABLE - PORTABLE OXYGEN CYLINDER
EFFECTIVITY
GUN ALL 35-30-00
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-30-00-220
Purpose
Protective breathing equipment (PBE) supplies a smokeless
head envelope (smoke hood) and a source of air for fire fighting
operations.
Physical Description
The protective breathing equipment has:
* A loose fitting, universal sized smoke hood with a
transparent panel
* An oronasal mask with demand valves and a speaking
diaphragm
* Pull straps
* An air supply system.
The PBE is sealed in a protective container for long storage life.
Location
The PBE is stowed in storage boxes. The storage boxes are
installed near the fire extinguishers in:
* The galley areas
* The flight compartment (optional).
Functional Description
Each PBE is self-contained and independent (separate).
The PBE supplies you with a smokeless head envelope and a
source of air.
The PBE is made of fireproof materials. It can easily be pulled
over your head. You can use the PBE with eye glasses.
The PBE has a transparent panel to give the user a wide field of
view.
An oronasal (mouth and nose) mask in the PBE supplies the
user with air. The mask has a speaking diaphragm. The
diaphragm allows the user to communicate verbally and to use
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