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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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OXYGEN - PASSENGER - DOOR TEST/RESET
OXYGEN - PASSENGER - DOOR TEST/RESET
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
Purpose
The oxygen generators supply emergency oxygen to the
passengers and flight attendants.
Physical Description
The oxygen generators are metal-cased cylindrical devices. A
spring-loaded firing mechanism is at one end of the generator.
An output manifold and a relief valve are at the other end.
Location
The oxygen generators are in these units:
* Passenger service units (PSUs)
* Lavatory service units
* Attendant service units.
Functional Description
The oxygen generators make oxygen by a chemical reaction. In
the reaction sodium chlorate and iron react to make salt and
gaseous oxygen. After the reaction starts, you cannot stop it.
The reaction continues until all the sodium chlorate is used. The
reaction produces heat and generator surface temperature can
get to 450F/232C.
The gaseous oxygen goes through a filter medium and then
flows out of the output manifold. The output manifold ports
connect to the passenger oxygen masks by flexible tubing.
A pressure relief valve prevents over pressurization of the
generator.
Operational Controls
The oxygen generator operates mechanically. When a
passenger pulls on an oxygen mask, a mask lanyard pulls on
the firing pin release cable. The release cable pulls the release
pin from the spring-loaded firing pin. The firing pin then strikes
the percussion cap.
The percussion cap supplies the energy necessary to start the
generator.
Operational Displays
A heat sensitive indicator on the generator shows the generator
condition. The indicator is a piece of tape and is usually orange.
The heat caused during the operation changes the indicator to
black.
You can not recharge used generators. Replace the generator if
the indicator is black.
OXYGEN - PASSENGER - OXYGEN GENERATOR
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
35-20-00-214
Training Information Point
A safety pin in the oxygen generator prevents accidental firing
during maintenance activities. The firing pins are cross-drilled
to accept a safety pin. You can use safety pin pliers to pull the
firing pin back to expose the safety pin hole. The safety pin
should have a ribbon to prevent a safety-pinned generator from
service.
WARNING: MAKE SURE TO REMOVE THE SAFETY PIN FROM
THE FIRING PIN ON THE OXYGEN GENERATOR.
THE OXYGEN GENERATOR WILL NOT FIRE IN AN
EMERGENCY IF THE SAFETY PIN IS INSTALLED.
CAUTION: YOU MUST BE VERY CAREFUL WHEN YOU
INSTALL AND REMOVE AN OXYGEN
GENERATOR. DO NOT DAMAGE THE OXYGEN
GENERATOR OR LET IT FALL. IF THE OXYGEN
GENERATOR IS DAMAGED, IT IS POSSIBLE THAT
THE OXYGEN GENERATOR WILL NOT FIRE.
CAUTION: DO NOT TRY TO REMOVE THE FIRING
MECHANISM FROM THE OXYGEN GENERATOR.
IT CANNOT BE ASSEMBLED AGAIN.
OXYGEN - PASSENGER - OXYGEN GENERATOR
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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
35-20-00-214
OXYGEN - PASSENGER - OXYGEN GENERATOR
OXYGEN - PASSENGER - OXYGEN GENERATOR
EFFECTIVITY
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OXYGEN - PASSENGER - OXYGEN GENERATOR
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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
The passenger oxygen masks supply breathing oxygen to
aircraft passengers and flight attendants during emergency
decompression of the aircraft.
Physical Description
The passenger oxygen masks have these parts:
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